I too have a set up using a plastic 55 gal drum. I use soda ash (washing soda) in mine, and it works great. I have put painted parts into it and almost all the paint comes off over night. well adheard paint stays, but any loose or with rust under it comes off. I pressure wash my stuff when it comes out, so that also helps. This may be a hairbrain idea, but I have thought about putting one togather with a 55 gal plastic drrum with a 30 gal steel drum inside of it to act as the sacraficial metal, that way you would have
360' line of site.
I don't know? Buy for those who want to set one up, go for it, they work.