secret to cleaning rusty metal

Muratic acid used properly will clean rusty metal and new metal such as square tubing that has foundry black coating. Put metal part in and in a short time it will be clean. Wear protective gear, rubber gloves, eye protection, respirator.

[@demonqueenpitts]

Very cool to see this process!

[@cccEngineer]

Muriatic acid is nice but it's dangerous. I rather just put things in Super Clean overnight. It does the same thing but it's biodegradable.