Welcome back Dave14: It's almost as if you were never gone. As far as thinning epoxy I tend to agree with pinball, I save my glue for gluing, and use finishing resin for fuel proofing, and alcohol for epoxy clean up. I use Vaseline (there's some ammo. guys) in the threads of blind nuts, but I also coat the bolts entirely before I thread them in, then just rinse them off with warm water after fuel proofing. Most definitely do the fuel tank compartment as well, you won't regret it, even if there's no fire it will keep the wood from getting saturated, much easier to clean up. I also use Vaseline on hinges to keep them from locking up when you glue them in. Or if using easy hinges, (the ones that are made of a fibrous material, with no actual hinge to speak of,) use a wax pencil, and draw a line, across the center line at the hinge point on both sides, this will keep them from hardening at the hinge line. always glad to help if I can. Garry