Fiberglass removal from steel

[chris vickery]

I have a M38A1 fuel tank that I aquired and the former owner tried to stop leak it by fiberglassing. The tank appears to be a good useable one if I got it lined but I would first need to strip the fiberglass off of it to see how bad it actually is.
Any suggestions to get this stuff off? I would rather not grind it, nor heat it, remember that this is a gas tank.
Is there a miracle cure all for this problem? I know some solvents will cut the resin but I don't need a huge mess or a toxic situation.
Would sandblast work?