Well, going off my experiance, about 20 years ago I put some on a few screwdrivers. So, ymmv on a pistol grip. Out of the 4 that I did, one became so chewed up, I ended up striping it the rest of the way off. That was the "main use" on though.

One became so slick, I could barely hang on to it when I used it. The third, well, Just about every bit of dirt and grime that was within a mile must have stuck to it, and it was impossible to get clean again.

The fourth one was one of those small control screwdivers, that, I never use that often. Still have that one and the plastidip is still on it and still looks fairly decent.