I use fishing lure paint and put a base of white on first and then a layer of red or green. The white base seems to increase the visibility of the top layer. I also like fiber optic sights for competition but have been reluctant to put them on a carry gun. The fiber optic sight that I like the best is the Firesight by Williams Gunsight. Durable and the red fiber looks as big as a stop light. Good for old eyes.