If you have small pieces you can get a kit from Eastwoods and do your own. Just make sure you have an old oven to bake the parts in. I don't think Momma would want you putting it into her oven. Anything that has any larger size to it you will not be able to do it at home. When a part is powder coated it has to be baked at approx. 350 deg. and the do-it-yourselfer it not set up to do that. Shop around. There are businesses starting up everyday that does powder coating and usually you get a price break on quantities.
Every powder you buy will have a tech data sheet that will tell the temperature and the duration of the bake. Make sure you do a very good cleaning first and if using an "old" oven. Check the temp inside with a gauge so you don't overbake or underbake it. I had an old oven that was 100 degrees off from what the dial read.