[Desert_Eagle02]

I've used vinegar to remove rust from the inside of gas tanks with great results. I've used it for old Jerry cans, old boat gas tanks, and motorcycle gas tanks. I dilute the vinegar a bit with water and pour it in. I then add a handful of bb's. Then shake it up and let it sit and put it on different sides over a course of a few days, shaking it up before switching sides. After a few days pour it out through a strainer and it should be good as new. Then use a gas tank paint to coat the inside.