sights
I have seen everything from model paint to glow in the dark smear, The only thing i see work is corrected lenses for the shooter. I love fixed sights revolvers, I leave them alone.
If it is a problem cylinder and slide shop have a fixed sight system that works very well, it's even available in night sights. It is attached to a fixed sight revolver by a gunsmith or at C&S shop. The new S&W night guard series uses them.