Resealing the inside of gas tank

I have a used custom gas tank that I need to remove the previous tank sealer from the inside.I can see ninor rust spots insidr tank and I removed a couple of dollar bill sized flakes of the previus sealer from the tank.I was told that M.E.K. was capable of doing this ,but when I put one of the flakes I removed from the tank into this solution it didn't seem to have any effect on it.I thought a radiator raditor repair sop might be able to boil out the inside of the tank, but I dont want to damage the tank.I was going to have the tank sandblasted prior to repainting so I'm not concerned about the finish on the tank.I already have the 3 part resealing kit,but I want to be sure every thing is out before resealing. Any ideas or suggestions?  

sandblasting would be my first choice. it will do the most thourough job.

another option is using chains, nuts and bolts in the tank. using a tank cleaner you can shake the tank around with the chain or nuts and bolts. it'll knock off the larger pieces for sure.

i'd try and do it right the first time. if the interior isn't well cleaned the new sealer won't adhere right and likely come up in the future.

let us know how it goes.

toph  

Electrolytic Rust Removal takes a while  but works a charm

http://www.motorcycleanchor.com/motorcycle/how_to/mc_tankrust.html  

Excellent Idea. I have taken it to a radiator repair shop to have it tank soaked in their radiator cleaning vat.If that doesn't do the job thoughly I will try the nuts and chain idea.Thanks for the advice.  

If thats what they do at radiator shops, then we are on the same page. Thanks for the info.  

Use Naval Jelly with nuts and bolts clanging around inside. Then drain and rinse with water. Dry with forced air like from the exhaust end of a vacumm cleaner.

I never had luck with the tank sealers. But I've been using Plyobond (used to be made by Goodyear but not now) that you can buy in any hardware store. Put a couple bottles in and roll the tank around to thoroughly coat it. Let the excess drain and let the tank sit for several days. It's cheap and foolproof. I've never had a tank rust or leak by doing this.

rollingbonesmcworks.com  

Naval Jelly! Why didn't I think of that? I've used it for years to clean metal.Excellent Idea! Thanks.  

I have used naval jelly with much success to clean the old stuff out. you can also use powerdercoating on the inside as an option to a sealing kit once the repair work has been done  

American Dry Stripping works the best for me. Then powder coating after the burn off oven.