I did the Durecoat thing and was very unhappy. It chipped and scratched very easily. Plus it was very expensive, and time consuming. We went to great lengths to see that we followed the instruction to the letter. We heated each part first, and we also baked every part just as the instructions recommend.
When I needed to do something with my Handi Rifle, I decided to go with the rough textured paint, feels like if has sand in the paint, from Rustolium. Painted all the metal and plastic parts with this. Then used the Rustolium Accents paint on the wood, the one that looks like rock. Rough texture makes it easy to grip with gloves or mittens on.