However,...
If you'd rather use what ya got, I've heard variances from a few short lengths of chain to a few handfulls of gravel, and shaking the snot out of it, turning the tank and rolling it over & around to hit everything. Then you empty it, rinse it out, stopper up the holes (that are supposed to be there) and fill with water to look for rust holes. After that, dry it out and coat it. Eastwood has a couple
tanl cleaner/sealer kits that are good There's also
POR-15 tank kits that come with a metal prep and sealer compound. The POR-15 costs a bit more, but having used thier other coatings I've been pleasntly suprised with the durability and look of the finished products.
