I had a local radiator shop clean and coat the tank for my little Mercury Bobcat and they did it and repaired the radiator for under 100 dollars.
OR if you like doin stuff yourself, get some small pea sized gravel......about a couple of cups and dump in the tank with some mineral spirits. Get a friend to help you shake the tank vigorously. I mean yall need to look like a couple or epileptic retards. No offense to anyone with either affliction. Then dump the gravel and mineral spirits out and rinse it out good. You can coat it yourself with Red Kote. Oreillys carries it. It works good.
