S&W 642, my fave little popper, except for those danged fixed sights ... mainly that rear notch. I put a dot of GlowOn orange to each side of the rear notch and bigger dot on the front blade. This made a huge difference for much better and faster sight acquisition. However, that paint just won't adhere well to the aluminum frame, no matter how I prepped the metal, and eventually rubs off. Anyone found a better way to enhance fixed sights? Maybe epoxy little rhinestones to the rear notch?