In sticking with my claim that a bit of work is better than no work, I did my first round of putty today. I just ran a strip around the top of the gun. Probably covered about a quarter of the entire edge. But hey, that's cool. I'm going to let this cure overnight, just to make sure it's fully done. This particular brand of putty is usually ready to sand in about 20 minutes, but I needed a good excuse to come upstairs and watch "Stardust", which was pretty good.