ok thanks i am proaby not going to do it. I was just wondering and i ight use somthing from around the house to add to my 10 gal my other ones have pleanty
Yes there is. Although it may be difficult to get your hands on. I paint bridges and water tanks and we use a zinc primer. Although I think you could use any quality metal primer then use an epoxy paint for water. The problem is clear coat. The epoxy comes in a clear coat but I have never seen a primer come in clear. But the primers do come in metallic colors. If its good enough for the water you drink for 20 years or more should be good for the tank.