Jeff, very cool tank. Hope you put a drain in it. For those that asked about paint and grease removal, just use Lye. I soaked my bumper brackets in lye without electrolysis just to remove the paint then did electrolysis to remove the rust. The experiment is just letting them sit afterwards, no paint, no Phosphoric acid. So far, no rust that I can see. I posted questions about using Lye and only a few knew about it, and they recommended expensive, smelly stripers. In this article they talk about using lye in electrolysis.

http://www.stovebolt.com/techtips/rust/electrolysis.pdf

Should be the best of all, at least for smaller parts.

Eric
http://s1199.photobucket.com/user/sparky234/library/My%2057%20Chevy%20Stepside?sort=3&page=1
'57 Chevy 3100 (Little Red)
'81 RD350 LC - Fun, Fun, Fun
'83 GS1100E - Pocket Rocket