In the past I was using muriatic acid to remove rust from mufflers etc, but the fumes made this an outside work proposition only. Last night I tried something different on some drill screwdriver bits, I mixed up some salt, vinegar, and some hydrogen peroxide. I put it in a pudding cup and within the first minute I could actually see some of the rust starting to fall off. I came back half an hour later and this was the result, 90% removal. The solution was room temperature, no doubt warming it would accelerate the process. A light scrub with cleanser removed the black coating and left bare metal.
A working rust removal option that won't curl your nose hairs.
A working rust removal option that won't curl your nose hairs.