I've used the Lingenfelter spray bomb on a couple of ZR-1's that a friend owned and wanted detailed. Even though it was spray bomb, it worked very well. Certainly not as durable as a powder coating, but the two cars I did with it came out very nicely. McClellan couldn't tell they had been touched when he judge them at the gathering.
I just talked to the guy who does all of our powder coating here at Tony's shop and he said he had a bunch of silvers to choose from. He'll do my parts for next to nothing, but a low cost job is worthless if anything gets screwed up. My big concern is damaging the cam covers!