Blood/oil stain fixes

- Fixed item descriptions calling oil-stained items "bloody"
- Fixed mob examine describing oil-stained bare hands and feet as "bloody"
- Fixed blood overlays on shoes not updating after walking through different colored blood
- Removed some colons

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -57,15 +57,21 @@ var/global/list/image/splatter_cache=list()
 	if((!l_foot || l_foot.status & ORGAN_DESTROYED) && (!r_foot || r_foot.status & ORGAN_DESTROYED))
 		hasfeet = 0
 	if(perp.shoes && !perp.buckled)//Adding blood to shoes
-		perp.shoes.blood_color = basecolor
-		perp.shoes:track_blood = max(amount,perp.shoes:track_blood)
-		if(!perp.shoes.blood_overlay)
-			perp.shoes.generate_blood_overlay()
-		if(!perp.shoes.blood_DNA)
-			perp.shoes.blood_DNA = list()
-			perp.shoes.blood_overlay.color = basecolor
-			perp.shoes.overlays += perp.shoes.blood_overlay
-		perp.shoes.blood_DNA |= blood_DNA.Copy()
+		var/obj/item/clothing/shoes/S = perp.shoes
+		if(istype(S))
+			S.blood_color = basecolor
+			S.track_blood = max(amount,S.track_blood)
+			if(!S.blood_overlay)
+				S.generate_blood_overlay()
+			if(!S.blood_DNA)
+				S.blood_DNA = list()
+				S.blood_overlay.color = basecolor
+				S.overlays += S.blood_overlay
+			if(S.blood_overlay && S.blood_overlay.color != basecolor)
+				S.blood_overlay.color = basecolor
+				S.overlays.Cut()
+				S.overlays += S.blood_overlay
+			S.blood_DNA |= blood_DNA.Copy()
 
 	else if (hasfeet)//Or feet
 		perp.feet_blood_color = basecolor