what is the best way to clean the light rust scale and crud from the inside of a gas tank ? it has been sitting empty for a little while. now i am getting rust or some thing stopping up my fuel line now that i have put it back in service. i can take the fuel line loose from the fuel pump and blow backward into the tank and unstop it.my tank is still good and solid and i just want to take it out and clean the crud out but don't know what to use or where to take it . can a radiator shop clean it?

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I found this page about how to clean your VW gas tank http://www.ratwell.com/technical/FuelTankRestoration.html

There are shops that will do this for you. Best advice is to keep you tank filled when storing your VW for an extended period of time. This will keep the air out of the tank and stop the rusting.
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