Options for gas tank repair

[John Middlesworth <jape@email.unc.edu>]

I took the old tank off the '72 Bee and emptied out the gas.  I can see a
fairly gunky looking surface when I look through the filler hole, although
the tank doesn't leak.  Here are the options I'm weighing:

1. Clean it out myself and through in some of the POR gas tank sealer.  Is
the stuff dependable?

2. Buy a new tank.

3. Take it to a Chem-strip rust and paint removal place.  It'll cost $85
but the process gets rid of everything.

Any thoughts?

John Paul Middlesworth