fixes a lot of things

code/modules/mob/dead/new_player/sprite_accessories/body_markings.dm

@@ -5,7 +5,7 @@
 /datum/sprite_accessory/body_markings
 	icon = 'icons/mob/mutant_bodyparts.dmi'
 	relevant_layers = list(BODY_ADJ_LAYER)
-	mutant_part_string = "bodymarkings"
+	mutant_part_string = "body_markings"
 
 /datum/sprite_accessory/body_markings/none
 	name = "None"

code/modules/mob/living/carbon/human/update_icons.dm

@@ -711,6 +711,8 @@ use_mob_overlay_icon: if FALSE, it will always use the default_icon_file even if
 			if(length(BP.markings_color) && length(BP.markings_color[1]))
 				for(var/color in BP.markings_color[1])
 					. += "-[color]"
+		if(BP.icon)
+			. += "-[BP.icon]"
 		else
 			. += "-no_marking"