Gents,
It is apparent (we'll see...) that I need a new fuel tank to correct my fuel issues; the mechanic said that the inside of my tank is corroding. Being that my car is of show quality, I decided that a new tank is the proper thing to do rather then renew the old one. But, that did not stop me from investigating.
http://www.gastankrenu.com/welcome.htmThis is a franchise that really renews the fuel tank. It isn't simply a coating--though that is part of the process, but they do indeed bead blast the tank inside and out, as well as renew the flower pot; there is some specific mention of plastic parts inside "some German fuel tanks" and these are removed and replaced. See the article from Popular Mechanics; its worth a read on the process:
http://www.popularmechanics.com/automotive/car_care/1266991.htmlMy suspicion is that this process is probably a bit more thorough then rattling an old chain or gravel around the gas tank and pouring in something yourself. Have a look-see at the process from the two url's I've provided here and file this under "fuel tanks" or "gas tanks".
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored