[JP Noonan]

The only one I know of is the Naval Jelly (acid) and "gooey" black coating. The process involves major protective equipment (i.e. acid gloves, goggles AND a full face sheild, coveralls, and a acid apron). After you look like you're working in a crystal meth lab, add acid and water to the tank (one goes before the other or BOOM) then let it heat up in the sun and sit over night. Then drain the acid and try to find somewhere that will dispose of it properly, the flush, dispose of the flush, then flush again and again. Dry. Add the one or two part black stuff, slosh. All in all very simple, and the basic kit is cheap. However, add in time and danger (little Joey knocks the tank over while it is baking, yikes!) and the saftey equipment and disposal fees...

I also know a guy with an old RX-7 who had a badly rusted tank (and car, but I digress) and had it professionally done. Sorry, I don't remember the name, but I've seen ads for them in several Hot Rod mags. They sand blast the tank inside and out, then coat it with polypropylene inside and out. The tank looked great, better than new. It also came with a 20 year (at least, or maybe lifetime, again sorry I don't remember) gurantee. The actual tank can be completely shot, they are basically just using it as a form. Talk to radiator shops in your area, that was how this guy got his done. He took it to the rad place and they sent it to the company. I think they have two plants, one east and one west, that do it. The cost seemed VERY reasonable at the time, maybe $150-$200. Compare that to a new tank.