Fuel tank taps

[PapuaPilot]

Have you talked to the factory?

I would hesitate using Pematex 2 without talking to them.

It might be possible to partially fill the holes with some resin and retap the holes, but you need to make sure you use the correct material that is compatible with fuel.

[Eric Page]

This stuff has much more of a thick paste consistency. Their high-fill version might do the trick for you.

FEDPRO Gasoila Pipe Thread Sealants