I just saw this message. When it comes to polymer i've always had to sand blast it. it has to be roughed up and de-greased before you apply the paint. I've used DuraCoat and love it.

Good luck

Hey... i saw your paint job on the glock! great job! Question: Does it take a special kind of paint to stick to polymer well? Im thinking of painting my glock frame and also my magpul PMAGs which are also polymer. Let me know. Thanks