Jfc that's a lot of work!

code/game/objects/items/airlock_painter.dm

@@ -68,7 +68,7 @@
 
 		// make some colorful reagent, and apply it to the lungs
 		L.create_reagents(10)
-		L.reagents.add_reagent("colorful_reagent", 10)
+		L.reagents.add_reagent(/datum/reagent/colorful_reagent, 10)
 		L.reagents.reaction(L, TOUCH, 1)
 
 		// TODO maybe add some colorful vomit?
@@ -81,7 +81,7 @@
 		return (TOXLOSS|OXYLOSS)
 	else if(can_use(user) && !L)
 		user.visible_message("<span class='suicide'>[user] is spraying toner on [user.p_them()]self from [src]! It looks like [user.p_theyre()] trying to commit suicide.</span>")
-		user.reagents.add_reagent("colorful_reagent", 1)
+		user.reagents.add_reagent(/datum/reagent/colorful_reagent, 1)
 		user.reagents.reaction(user, TOUCH, 1)
 		return TOXLOSS