I used the eastwood kit, and no matter what I tried (acids, chains, rocks, bolts) I could never get the inside of the tank clean enough. The problem is that it is very difficult to get the underside of the tank top clean, and the sloshing fuel would break off debris that would clog my fuel filter after even a short drive. Unless the entire inside of tank is surgically clean and properly etched, the "pour-in" sealers will eventually fail. So I went with the Gas Tank Renu process.
http://www.gastankrenu.com/how.htm Have this done to the tank and your will never ever have another problem. The tank is coated inside and out and the coating is baked on. Since they media blast the tank inside and out, no chance of the coating peeling off and clogging fuel lines from improper prep. Also the coating they use cures rock hard, not rubbery like the pour in types.
Several of us here on the website have had this done, and no reported problems since then. The process has a lifetime guarantee at any of their franchisees and they secure a little serial number to the top of the tank.
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