I got this drum for a good price as it was badly pitted. I stripped it of its parts, polished up the chrome and sent the shell over to my dad's auto body shop to have it painted GM "Dark Sprial Grey". This pic doesn't really do the finish justice!
After sanding the shell, an etching/building primer was sprayed on to provide adhesion and even the surface out. After a wet sanding, a sealer, then a high quality automotive base coat-clear coat was applied.