I just played with it again yesterday. I don't have a scratch yet. It's as durable as the original paint finish on the gun. Automotive grade stuff. The kit I bought had a flat finish clear coat. That means it is not meant to be shiny. But from my experience you have a sliding scale between dull and rough/ shiny and smooth. The more coats of clear coat you put on the smoother it is, but also the shinier. With 2-3 coats it wasn't shiny at all and it feels like 1000 grit sandpaper. Which really isn't rough at all, but it is textured. At 4-5 coats it does shine a little but it is as smooth as glass. Keep in mind the kit I bought comes with an airbrush. If you buy a kit that uses aerosol paint cans it uses much lower pressure, which means bigger drops of paint, which means a courser finish and better chance of chipping.
After using my hydro'd equipment for a few days, I think there is a zero percent chance of chipping. This stuff is diamond hard and it has become part of the gun. You might be able to scratch it, but you'll never chip it.
Here's some of the films they have. They have more if you email them.
The one I used is conceal green.