Before I switched to optic sights on my bowling pin revolver, I used to paint the front sight white.
What worked well for me was a base coat of white enamel out of one of those little "Testor's" bottles that they sell in the hobby shops. Once that dried I would go over it with "White-Out", which gave a low gloss white.
In fact, back then that is just about anyone around here who didn't have optics did.
Of course, for pin shooting just about everyone now has optics and... do they still sell "White-Out"? Not sure.
Rick