The powder coat I do is done by a large commercial coating firm that just happens to be owned by a relative and close friend. There are powder coating guns available that are fairly reasonable in price and any oven large enough to hold the workpiece and bring it to 400 degreesF is quite sufficient. There is almost no odor and the material is quite inert. It doesn't come from a spray can and the tool cost to do a single weapon would probably not be justifieable, but if several are contemplated, perhaps.. It provides a very durable finish that will hide some roughness.