The good news is that I had my gas tank cleaned and recoated. While the local company came recommended, I do have one slight issue. They used Red Kote to as the liner. For better or worse, they had to use two coats. Unfortunately, this narrowed the holes for the petcocks to the point that the copper petcock filters will not fit in. As such, I need to thin the coating. Does anyone know what would be good to use?