Just had an article come across my desk that deals with repairing leaking fuel
tanks.

The company that does the repairs pumps the fuel out of the tank, cuts an
access hole, cleans up the suspect areas of the tank with a wire brush, and
epoxies the ruptured spot and the surrounding area.

Cost is supposedly $1500- $1800 per tank, including a "fuel polish".

In some cases, it might beat tearing up an entire boat to replace a tank.

If anybody has an interest in further information, I'll supply the name of the
company and contact information by e-mail.