I did the clean yourself route and it sucks however if you do that get with someone else and do 2 at once, much of the products can be used over and there will be left over sealer enough for a couple tanks. Depending on tank size.
like....http://www.carestoration.com/gastanks.htm
http://www.ratwell.com/technical/FuelTankRestoration.htmlSearch gas tank restoration on Yahoo or Google you'll find lots of tips.
One thing for sure if you do your own get a heat gun drying the inside with a hair dryer is a slow go. Good luck !
