I sprayed it. The duracoat sticks to the platic extremely well. I've done other things in the past that only have scratches in them because it was stong enough to scratch the plastic. This was a commando with the green, then I duracoated it black for a few months. During which time it saw some pretty good abuse in the rain/mud and rubbing agaisnt gear, without any signs of wear, just small faint scratches. I'm a huge fan of duracoat. I also use the flexing agent now. I did my safariland holster with the SIG so ill see how it holds up as well.