diff --git a/src/apps/epic/static/apps/epic/sea.js b/src/apps/epic/static/apps/epic/sea.js
index 75e59b4..c38b72c 100644
--- a/src/apps/epic/static/apps/epic/sea.js
+++ b/src/apps/epic/static/apps/epic/sea.js
@@ -227,6 +227,31 @@ var SeaDeal = (function () {
             });
         }
 
+        // Polish-6 — FLIP btn (rotateY 0→90→0 over 500ms, toggle
+        // `.is-flipped-to-back` at midpoint). Renders unconditionally per
+        // user-spec "allow the FLIP btn everywhere"; no-ops when the card
+        // has no `.sig-stage-card-back-img` sibling (back-img only renders
+        // server-side for non-polarized image-equipped decks; text-mode +
+        // polarized image decks render no back-img + the FLIP is inert).
+        // Mirrors `_flipToBackAnimated` shape from my_sign.html / applet.
+        var flipBtn = stage.querySelector('.sea-stage-flip-btn');
+        if (flipBtn) {
+            flipBtn.addEventListener('click', function () {
+                if (stageCard.dataset.flipping) return;
+                if (!stageCard.querySelector('.sig-stage-card-back-img')) return;
+                stageCard.dataset.flipping = '1';
+                stageCard.animate([
+                    { transform: 'rotateY(0deg)' },
+                    { transform: 'rotateY(90deg)', offset: 0.5 },
+                    { transform: 'rotateY(0deg)' },
+                ], { duration: 500, easing: 'ease' });
+                setTimeout(function () {
+                    stageCard.classList.toggle('is-flipped-to-back');
+                }, 250);
+                setTimeout(function () { delete stageCard.dataset.flipping; }, 500);
+            });
+        }
+
         // Clicking the FYI panel itself dismisses it (same as sig-select caution)
         if (fyiPanel) {
             fyiPanel.addEventListener('click', function (e) {
diff --git a/src/static_src/scss/_card-deck.scss b/src/static_src/scss/_card-deck.scss
index 117b219..3ee411d 100644
--- a/src/static_src/scss/_card-deck.scss
+++ b/src/static_src/scss/_card-deck.scss
@@ -989,12 +989,15 @@ html:has(.sig-backdrop) {
     background: rgba(var(--duoUser), 1);
 }
 
-// Polish-5: my_sign main + applet FLIP btns share one positioning rule.
-// Both live INSIDE their card (`.sig-stage-card` / `.my-sign-applet-card`,
-// both `position: relative`) so `bottom: 0.6rem; left: 0.6rem` anchors
-// universally to card-bottom-left w/o needing surface-specific calc().
+// Polish-5: my_sign main + applet + sea_stage FLIP btns share one positioning
+// rule. All live INSIDE their card (`.sig-stage-card` / `.my-sign-applet-card`
+// / `.sig-stage-card.sea-stage-card`, all `position: relative`) so `bottom:
+// 0.6rem; left: 0.6rem` anchors universally to card-bottom-left w/o needing
+// surface-specific calc(). Polish-6 added sea-stage-flip-btn for the sea_stage
+// modal per user-spec "allow the FLIP btn everywhere".
 .my-sign-flip-btn,
-.my-sign-applet-flip-btn {
+.my-sign-applet-flip-btn,
+.sea-stage-flip-btn {
     @include flip-btn-base;
     z-index: 25;
     bottom: 0.6rem;
@@ -1012,19 +1015,22 @@ html:has(.sig-backdrop) {
 .my-sign-stage.sig-stage--frozen .sig-stage-card:hover .my-sign-flip-btn,
 .my-sign-stage.sig-stage--frozen .sig-stage-card:has(.my-sign-flip-btn:hover) .my-sign-flip-btn,
 .my-sign-applet-card:hover .my-sign-applet-flip-btn,
-.my-sign-applet-card:has(.my-sign-applet-flip-btn:hover) .my-sign-applet-flip-btn {
+.my-sign-applet-card:has(.my-sign-applet-flip-btn:hover) .my-sign-applet-flip-btn,
+.sea-stage-card:hover .sea-stage-flip-btn,
+.sea-stage-card:has(.sea-stage-flip-btn:hover) .sea-stage-flip-btn {
     @extend %flip-btn-revealed;
 }
 
-// Unified mid-flip-hide across all 3 surfaces. `[data-flipping]="1"` is set on
+// Unified mid-flip-hide across all 4 surfaces. `[data-flipping]="1"` is set on
 // the card by each surface's FLIP handler for the 500ms rotation duration;
 // `%flip-btn-mid-flip`'s `display: none` makes the btn vanish INSTANTLY (per
 // user spec — no ease-out logic competing w. the click). Selector chains
 // differ per surface because the btn-to-card DOM relationship varies (btn is
-// INSIDE the card on my_sign + applet post-polish-5; sibling under .tarot-
-// fan-wrap for the fan).
+// INSIDE the card on my_sign + applet + sea_stage; sibling under .tarot-fan-
+// wrap for the fan carousel).
 .sig-stage-card[data-flipping] .my-sign-flip-btn,
 .my-sign-applet-card[data-flipping] .my-sign-applet-flip-btn,
+.sea-stage-card[data-flipping] .sea-stage-flip-btn,
 .tarot-fan-wrap:has(.fan-card[data-flipping]) .fan-flip-btn {
     @extend %flip-btn-mid-flip;
 }
diff --git a/src/templates/apps/billboard/_partials/_applet-my-sign.html b/src/templates/apps/billboard/_partials/_applet-my-sign.html
index d7f98ad..b978104 100644
--- a/src/templates/apps/billboard/_partials/_applet-my-sign.html
+++ b/src/templates/apps/billboard/_partials/_applet-my-sign.html
@@ -18,23 +18,26 @@
                  data-card-id="{{ card.id }}"
                  data-arcana-key="{{ card.arcana }}">
                 {% if card.deck_variant.has_card_images %}
-                    {# Sprint A.6 — image-mode render mirrors my_sign.html's   #}
-                    {# .sig-stage-card--image treatment. Shares the SCSS rule  #}
-                    {# (comma-list selector) so the contour stroke + tray-card #}
-                    {# silhouette black depth shadow + arcana stroke-color    #}
-                    {# come for free.                                          #}
+                    {% comment %}
+                    Sprint A.6 — image-mode render mirrors my_sign.html's
+                    .sig-stage-card--image treatment. Shares the SCSS rule
+                    (comma-list selector) so the contour stroke + tray-card
+                    silhouette black depth shadow + arcana stroke-color
+                    come for free.
+                    {% endcomment %}
                     <img class="sig-stage-card-img" src="{{ card.image_url }}" alt="{{ card.name }}">
                     {% if not card.deck_variant.is_polarized %}
-                    {# Non-polarized image deck: FLIP btn shows the deck back  #}
-                    {# image (same behavior as my_sign.html main page). Both   #}
-                    {# the back-img + flip-btn nest INSIDE the card so the    #}
-                    {# absolute-positioned FLIP btn anchors to the card's     #}
-                    {# bounds (card is position: relative in --image mode).   #}
+                    {% comment %}
+                    Non-polarized image deck: back-img element renders the
+                    deck-back PNG that FLIP toggles to. Back-img stays gated
+                    (back-img is meaningless for polarized decks or text-mode);
+                    the FLIP btn itself moved OUT of this gate in polish-6 so
+                    it renders for every card (per user-spec "allow the FLIP
+                    btn everywhere"). The JS click handler is a no-op when no
+                    back-img sibling exists.
+                    {% endcomment %}
                     <img class="sig-stage-card-back-img" alt=""
                          src="{{ card.deck_variant.back_image_url }}">
-                    <button class="btn btn-reveal my-sign-applet-flip-btn"
-                            type="button"
-                            aria-label="Flip to deck back">FLIP</button>
                     {% endif %}
                 {% else %}
                     <div class="fan-card-corner fan-card-corner--tl">
@@ -42,15 +45,17 @@
                         {% if card.suit_icon %}<i class="fa-solid {{ card.suit_icon }}"></i>{% endif %}
                     </div>
                     <div class="fan-card-face">
-                        {# `request.user.sig_face` is the rendering payload from #}
-                        {# `TarotCard.applet_face()` — mirrors `populateCard` in #}
-                        {# `stage-card.js:135-144`:                              #}
-                        {#   • Polarity-split (cards 48-49, trumps 19-21):       #}
-                        {#     single-line title, qualifier blank.                #}
-                        {#   • Major + qualifier: title carries a trailing       #}
-                        {#     comma + qualifier renders BELOW.                  #}
-                        {#   • Non-Major (middle court, Schizo / Nomad w. no    #}
-                        {#     qualifier): qualifier renders ABOVE the title.   #}
+                        {% comment %}
+                        `request.user.sig_face` is the rendering payload from
+                        `TarotCard.applet_face()` — mirrors `populateCard` in
+                        `stage-card.js:135-144`:
+                          • Polarity-split (cards 48-49, trumps 19-21):
+                            single-line title, qualifier blank.
+                          • Major + qualifier: title carries a trailing
+                            comma + qualifier renders BELOW.
+                          • Non-Major (middle court, Schizo / Nomad w. no
+                            qualifier): qualifier renders ABOVE the title.
+                        {% endcomment %}
                         {% with face=request.user.sig_face %}
                         {% if face.qualifier_first %}
                             <p class="fan-card-qualifier">{{ face.qualifier }}</p>
@@ -67,6 +72,16 @@
                         {% if card.suit_icon %}<i class="fa-solid {{ card.suit_icon }}"></i>{% endif %}
                     </div>
                 {% endif %}
+                {% comment %}
+                Polish-6 — FLIP btn rendered UNCONDITIONALLY (was gated on
+                `has_card_images and not is_polarized`). Per user-spec
+                2026-05-25 PM "just allow the FLIP btn everywhere". JS
+                handler below picks behavior by sibling existence: back-img
+                present → flip-to-back animation; absent → no-op.
+                {% endcomment %}
+                <button class="btn btn-reveal my-sign-applet-flip-btn"
+                        type="button"
+                        aria-label="Flip card">FLIP</button>
             </div>
             {# Stat block — same shape as my_sign.html's `.sig-stat-block`  #}
             {# (Emanation face label + keyword list) but no SPIN/FYI btns  #}
@@ -82,25 +97,28 @@
                 {% endcomment %}
                 {% include "core/_partials/_stat_face.html" with face_modifier="upright" label_text="Emanation" card=card %}
             </div>
-            {# Sprint A.6 — applet FLIP btn handler. Mirrors my_sign.html's    #}
-            {# `_flipToBackAnimated()` shape (rotateY 0→90→0 over 500ms, class  #}
-            {# toggle at halfway, `data-flipping` attr for SCSS to hide the    #}
-            {# btn). Self-contained inline script — no shared module needed    #}
-            {# since the applet is the only consumer outside the main page    #}
-            {# (which has its own copy). Script wrapped inside the sig-present #}
-            {# branch AND inside `{% with card %}` scope so `card` references  #}
-            {# resolve + the JS selector strings don't leak into the no-sig    #}
-            {# DOM (which would trip substring-matching tests).                 #}
-            {% if card.deck_variant.has_card_images and not card.deck_variant.is_polarized %}
+            {% comment %}
+            Polish-6 — applet FLIP btn handler. Mirrors my_sign.html's
+            `_flipToBackAnimated()` (rotateY 0→90→0 over 500ms, class
+            toggle at halfway, `data-flipping` attr for SCSS to hide the
+            btn during animation). Script is now UNGATED (was conditional
+            on `has_card_images and not is_polarized` like the FLIP btn
+            itself); per user-spec "allow the FLIP btn everywhere", the
+            handler always wires + gracefully no-ops when there's no
+            `.sig-stage-card-back-img` sibling to toggle.
+            {% endcomment %}
             <script>
             (function () {
                 var applet = document.getElementById('id_applet_my_sign');
                 if (!applet) return;
-                var c = applet.querySelector('.my-sign-applet-card--image');
+                var c = applet.querySelector('.my-sign-applet-card');
                 var b = applet.querySelector('.my-sign-applet-flip-btn');
                 if (!c || !b) return;
                 b.addEventListener('click', function () {
                     if (c.dataset.flipping) return;
+                    // No-op when no back-img to toggle (text-mode +
+                    // polarized image-mode decks render no back-img).
+                    if (!c.querySelector('.sig-stage-card-back-img')) return;
                     c.dataset.flipping = '1';
                     var rest = 'rotateY(0deg)';
                     var mid  = 'rotateY(90deg)';
@@ -120,7 +138,6 @@
                 });
             }());
             </script>
-            {% endif %}
             {% endwith %}
         {% else %}
             <p class="my-sign-applet-empty">No sign chosen yet.</p>
diff --git a/src/templates/apps/gameboard/_partials/_sea_stage.html b/src/templates/apps/gameboard/_partials/_sea_stage.html
index 56b3093..001ac69 100644
--- a/src/templates/apps/gameboard/_partials/_sea_stage.html
+++ b/src/templates/apps/gameboard/_partials/_sea_stage.html
@@ -41,6 +41,24 @@
                 <span class="fan-corner-rank"></span>
                 <i class="fa-solid stage-suit-icon" style="display:none"></i>
             </div>
+            {% comment %}
+            Polish-6 — back-img + FLIP btn. The back-img mirrors the
+            my_sign.html / _applet-my-sign.html pattern: only renders
+            for non-polarized image-equipped decks (since back-img is
+            meaningless otherwise; src derives from user's equipped
+            deck). FLIP btn renders UNCONDITIONALLY per user-spec "allow
+            the FLIP btn everywhere"; sea.js's click handler no-ops
+            when no back-img sibling exists. Multi-user gameroom is a
+            known limitation here — the back-img src is the room
+            viewer's deck-back, not the drawing gamer's, which is wrong
+            when different gamers' decks have different backs. Parked
+            for a future multi-user polish pass.
+            {% endcomment %}
+            {% if request.user.is_authenticated and request.user.equipped_deck.has_card_images and not request.user.equipped_deck.is_polarized %}
+            <img class="sig-stage-card-back-img" alt=""
+                 src="{{ request.user.equipped_deck.back_image_url }}">
+            {% endif %}
+            <button class="btn btn-reveal sea-stage-flip-btn" type="button" aria-label="Flip card">FLIP</button>
         </div>
         <div class="sig-stat-block sea-stat-block">
             <button class="btn btn-reverse spin-btn" type="button">SPIN</button>