[Gaff]

Just a thought, maybe a dab of hideously bright nail polish into the dimple of each white dot. Something like fluorescent orange? God only knows, they've got some weird colors in nail coverings these days.

If applied carefully, it should dry very hard, and may not be effected by Hoppe's or other cleaning fluids. Not too sure on that, but I know it takes acetone to get some types off. I also know that Ed's Red homemade gun cleaning solution has a bit of acetone in the recipe.

Just thinking, that's a much easier solution than drifting out the sights. And, may provide a better "quick lock on" image. Might be worth a try?