My winter project is rebuilding an old 126 that has been setting for quite some time. I'd like your ideas for the solvent (or a combination of solvents) to clean out the rust and varnish that has built up in the metal gas tank. I'm thinking maybe gasohol and Sea Foam almost full tank and shaking early and often and then pouring the whole think on a brush pile next time I have a bonfire followed by blowing the tank completely dry with the blow gun on the compressor. Your thoughts and opinions...???