Question

How can I effectively remove old varnish from a gas tank that has been stored for a long time?

Answer 1

Kbs Coatings makes a great kit for just that. It has a real concentrated cleaner/degreaser that will dissolve all that junk. also comes with a metal prep and tank sealer by far the best I've used...have to say it performs better than POR15 and found it to be less expensive too. Great tech support too by the way.

Answer 2

all the parts chains sell those type of products but to do it right you need to remove tank-take it to radiator shop and have them clean and seal it or you may want to consider an aftermarket fuel cell due to expense of repairing tank

Answer 3

Goto "eastwood.com" and look for gas tank restoration. They have some really good products including "POR-15". That you may be interested in. This is not a problem you can solve w/ the tank still in the car.

Answer 4

Hopefully you mean dissolving it when it's off so you can flush it out. Nothing works better than a couple gallons of Techron to get that crap out.