Thanx, GW, appreciate the reponse. Didn't know what else to call them .... the holes in the front and rear sights that, when done up with some contrasting color fill, you use for "gun control" (that is, hitting your target). My head is wacked out from some pain meds I'm taking .... back operation ... sometimes I forget my name.
I have always liked the KISS theory, so I will try your suggestion re: the white crayon. Now that I think about it, maybe I will try yellow. Reason is, when I was helping my son put together a kalashnikov, we bent the front sight post while trying to clean out the goop that the Yugoslavs used to preserve the gun. When we bought one of those 5-color replacement front sight post packages, we found that yellow worked best .... turned dark in daylight, and turned yellow in low light.
Again, thanx./jfk