As for your tank. I sealer I used in my tank is really good stuff. If it's only pin holes your dealing with it will seal them no problem at all. If there a little larger than that I would go over them with lead to plug them and let the sealer do it's job after that. Just cap over the opening of the petcock and other holes. JB weld is also good stuff but to me it just seems as a temporary fix but that's only my opinion and I am wrong some times, Just ask my wife!
The high build primer I use is fantastic stuff. I've always used it on all my restoration jobs. With my paint work you'll never see any sand paper scratches in the paint or imperfections because partly of that high build primer and spot putty.
As for clear coats. Well clear coats are used widely in the automotive world and fuel has never removed the clear on them. actually my goldWing is clear coated and I've used gasoline to remove tar from the paint at times so it's a good product to use.
I always use two HVLP guns because if I use one gun for the paint I never have to worry if I get one little spot of paint left in the gun It won't come out into the clear so that's why I use a separate gun just for clear. If it's only used for clear that's all that's in there to come out. I also use a different nozzle for my clear but it's the same gun but you can get by with just one gun and the nozzle that came with it as long as you clean it well after each use.
I also use an old gravity feed gun for my high build primer. Never use your good gun for primer.
I have detailer instructions for the sealer if you need them. let me know and I'll post them for you. Hope this helps you out. Keep asking questions, that's how we all learn this stuff. Paul
Inside of tank!
