Yes, and it works. I covered some rusted areas on mine nearly 3 yrs ago, and
it has not rusted back through. If you use this stuff, get a respirator and
latex gloves. It has quite a stench to it, and you will have one hell of a
headache if you use this stuff in an enclosed area for any length of time.
Also, the can warns not to get the stuff on your skin- it won't wash off, not
with soap & water, not with mineral spirits, turpentine, etc. it just won't
come off, it will be on your skin for days til it wears off. Eastwood sells
another product, Corroless, and it is less toxic and seems to work just as
well as POR 15. I've used both with excellent results.  Good luck,   Jeff S.