Getting ready to send the sheet metal to the painter. The tank is new and bare. This is for the woman's Sporty. I'm going to clean and coat the inside of the gas tank before I take it. The tank is bare, from Paughco. The inside I'm using the ole trusty Red-Kote. The question is this, just inside the tank in the space between the cap and the smaller hole actually going into the tank, what's the best way to seal that? Let the Red-Kote flow up into that area? There is light surface rust so I'd like to remove that and keep it from coming back. I've seen rust converter products but I'm wondering will they break down from coming in contact with the fuel?