available in the supermarket
Well, that sounded like more trouble than just repairing your original tank. You know that old saying, "The devil you know is better than the devil you don't know."Richard L.
Scotchbrite is impregnated with an abrasive which will not help your engine.
found on a shelf with things like pectin but if the supermarket does not have it, try Boots, Wilkinsons or a