Fuel tank moistness

[Stead]

Noticed under the strap on my 9000CS, there is a widdening wet patch, like a minor pin hole leak of some sort.

What is the best remedy for this?

Do I have to remove the tank and have it plastic welded?

Are there any pastes on the market that are suitable?

[wedgepilot]

Are you sure the wet patch is petrol? Could it be water spray/dampness/moisture that's run down the strap?

Although, people might think you have a strange fetish if you start sniffing your Saab