Yes shorts correct
Bluing nor Parkerizing will not take correctly if you do them over a metal paste or epoxy. I wasn't talking about this gun as far as bluing or parking goes since this is one is aluminum and it would need to be painted or anodized. If you have a metal framed or aluminum gun and want to fill in a burr or divot or lettering, it can be filled with the paste or epoxy and then painted over. If you are going to anodize it or blue or park it, you need to sand or file the mark or whatever out first and then refinish it.