This is my first attempt at powder coating anything, and I am pretty happy with the results. Who am I kidding, I am extremely happy! It isn't flawless, but it looks great nonetheless.
It was very easy to do, much easier than I had thought it would be. Get all the old gunk off your part.
Preheat it to 450 degrees in your oven dedicated to your shop, not your kitchen! After about half an hour of heating the part, take it out and if you want to be very thoourough, clean it with acetone and put it back in the oven for another half hour. Once the preheat/cleaning is done, you can hook up your ground wire and begin spraying. I used the Eastwood Hot Coat Dual Voltage gun set to the low setting, and Silver Vein powder. It would be difficult to put too much powder on, so just make sure you have it well covered, it seems to even itself out very well. The thicker you cake it on, the more intense the hammered finish will be. Once you have it well covered, put it back in the oven at 450 degrees for about 10 minutes, check it every five minutes or less though. You are looking for it to have changed from powedr to liquid, they call it "flow-out". It will look like it is almost finished, that is when you want to lower the temp down to 400 degrees and set a timer for 20 minutes for the curing process. Once the curing process is done, take it out and let it cool. I did a second coat, you use the same process, but you can turn the voltage to the high setting if needed to get a better coating. Here is a before and after of sorts.