I have an old cz27 .32 auto (fnh pistole model 27 7.65 cal.) from WWII. The front sight is in good condition but I'd like to coat it with something to make it more visible. The rear sight is a V dovetail. I suppose I could have the front sight filed down and replaced and also replace the rear sight with something better but the gun is original with waffen emblems and I don't want to modify it. Is there some type of paint or other coating that is made for highlighting sights?