From acid baths to sand blasting, there are lots of ways to clean out a corroded gas tank. Add another, better method to the list. Metal Rescue from Workshop Hero is simpler, easier, and safer than any other process I’ve tried (and I’ve tried them all). Metal Rescue is a non-toxic, water-based mixture, so it won’t ravage your skin or damage painted, plastic, or rubber parts. And it works. Like magic.