Gas tank help

I JUST did this to my Bobcat gas tank. The chain works good. After I got done, I still took it to my local radiator shop and they cleaned it more and coated it inside and out for 80 bucks. Considering a new Bobcat tank is 250 bucks, that was a deal. Now that it's coated it will last forever. Don't waste money on a new tank if you can save your old one.