x3 for vinegar and elbow grease. If applied repeatedly or soak a part in it, it will remove the rust entirely. I have tried other chemicals but vinegar is cheaper and safer to use.Vinegar as described above, then use the wire wheel or use 120 - 180 grit flap wheel.
Muriatic acid is basically magic in removing rust but it’s important to remember to neutralize the acid ASAP after the rust is gone.They do work well, I recommend a 3500 psi pressure washer and #30 sand. You do have to get it in primer asap. I only do it on hot days to help it dry. I slso use shop air to get all the sand out of the nooks and crannies!( the only downside, and its messy!) another trick is muriatic acid( it works well, but obviously dangerous to use.
Where can I get muriatic acid? Is it easy to obtain?Muriatic acid is basically magic in removing rust but it’s important to remember to neutralize the acid ASAP after the rust is gone.
Definitely wear googles, thick rubber gloves, and stay upwind of muriatic acid if you’re using it.