[masraum]

Evaporust is a chemical that removes rust through the chemistry process of chelation. When a rusty part soaks in a bucket of Evaporust, the molecules of Evaporust attach to rust molecules and remove them from the surface of the part. Eventually all the rust is picked clean from the surface. There are two big downsides to this process. First, Evaporust will leave the part with the ugliest uniform dull gray color you can imagine.

If any part of the tool sticks above the Evaporust solution while soaking, you’ll create an endless chemical reaction at the waterline where rust is continually created by oxidation and then removed by the Evaporust. That will produce a deep irreversible line in the metal of your tool at the waterline.

use Evaporust in two situations: (1) On iron parts when I want to remove rust with as little work possible (for example if I plan to turn the part black again by bluing or seasoning with oil then baking it) or if I just don’t care what the parts look like afterward and (2) on small parts such as screws and washers when I plan to buff them with polishing compound afterwards to restore their shine. Each part in a reverse electrolysis operation must be connected to the power source, and it usually isn’t convenient to do that with a bucket of screws.