ok

code/game/objects/effects/decals/cleanable.dm

@@ -5,6 +5,8 @@
 	var/persistent = FALSE
 	/// Can we stack multiple in one tile?
 	var/persistence_allow_stacking = FALSE
+	/// Are we deleted by turf changes?
+	var/wiped_by_turf_change = FALSE
 
 	var/list/random_icon_states = null
 	var/blood_state = "" //I'm sorry but cleanable/blood code is ass, and so is blood_DNA

code/game/objects/effects/decals/cleanable/misc.dm

@@ -64,6 +64,7 @@
 	beauty = -75
 	mergeable_decal = TRUE
 	persistent = TRUE
+	wiped_by_turf_change = TRUE
 
 /obj/effect/decal/cleanable/dirt/Initialize(mapload)
 	. = ..()

code/game/turfs/simulated/floor.dm

@@ -138,6 +138,9 @@
 	burnt = 1
 
 /turf/open/floor/proc/make_plating()
+	for(var/obj/effect/decal/cleanable/C in src)
+		if(C.wiped_by_floor_change)
+			qdel(C)
 	return ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/ChangeTurf(path, new_baseturf, flags)

code/game/turfs/simulated/floor/plating.dm

@@ -61,6 +61,9 @@
 			to_chat(user, "<span class='notice'>You begin reinforcing the floor...</span>")
 			if(do_after(user, 30, target = src))
 				if (R.get_amount() >= 2 && !istype(src, /turf/open/floor/engine))
+					for(var/obj/effect/decal/cleanable/C in src)
+						if(C.wiped_by_floor_change)
+							qdel(C)
 					PlaceOnTop(/turf/open/floor/engine, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					R.use(2)
@@ -78,6 +81,9 @@
 			to_chat(user, "<span class='notice'>You begin adding glass to the floor...</span>")
 			if(do_after(user, 5, target = src))
 				if (G.get_amount() >= 2 && !istype(src, /turf/open/transparent/glass))
+					for(var/obj/effect/decal/cleanable/C in src)
+						if(C.wiped_by_floor_change)
+							qdel(C)
 					PlaceOnTop(/turf/open/transparent/glass, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					G.use(2)
@@ -95,6 +101,9 @@
 			to_chat(user, "<span class='notice'>You begin adding reinforced glass to the floor...</span>")
 			if(do_after(user, 10, target = src))
 				if (RG.get_amount() >= 2 && !istype(src, /turf/open/transparent/glass/reinforced))
+					for(var/obj/effect/decal/cleanable/C in src)
+						if(C.wiped_by_floor_change)
+							qdel(C)
 					PlaceOnTop(/turf/open/transparent/glass/reinforced, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					RG.use(2)
@@ -110,6 +119,9 @@
 			var/obj/item/stack/tile/W = C
 			if(!W.use(1))
 				return
+			for(var/obj/effect/decal/cleanable/C in src)
+				if(C.wiped_by_floor_change)
+					qdel(C)
 			if(istype(W, /obj/item/stack/tile/material))
 				var/turf/newturf = PlaceOnTop(/turf/open/floor/material, flags = CHANGETURF_INHERIT_AIR)
 				newturf.set_custom_materials(W.custom_materials)

code/game/turfs/simulated/floor/reinf_floor.dm

@@ -43,6 +43,9 @@
 			return TRUE
 		if(floor_tile)
 			new floor_tile(src, 2)
+		for(var/obj/effect/decal/cleanable/C in src)
+			if(C.wiped_by_floor_change)
+				qdel(C)
 		ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	return TRUE