I painted the ignition switch a few days ago before I had the idea of making any tutorials so all I have are pictures after it was painted, it is still taped up, I used blue painter's tape, the Duck brand, I tore off small pieces and put them on the key slot and pushed parts of the tape around the edge of it and I taped all around the mechanical part as shown. I used a dremel tool with a wire brush to remove all of the powder coat black before I painted it. Then I used Rustoleum primer spray paint and put 3-4 coats on it letting each coat dry, and then waited one day. After that I just used Wal-Mart brand glossy black spray paint and put about 4-5 coats on it letting each coat dry before another application and then let it sit for about 2 days to finish drying.
I took the best pictures I could.