Their directions/instructions say:
- Thoroughly wash/rinse with clean water.
- If particles need to be scrubbed off when rinsing, let it dry, re-apply, and rinse again with water.
"No further treatment is required once the rust has been removed with Evapo-Rust®.
In some cases, residual rust may still be embedded in the metal (pits, crevices) after the initial soaking. In this case, rinse the metal with water and re-soak in Evapo-Rust®. All residual rust will be removed from these hard to reach places.
It is important to always rinse the metal after a treatment with Evapo-Rust®. Tiny molecules of iron will still be embedded in the Evapo-Rust® solution, and these molecules must be rinsed off with water or they will activate the re-formation of rust on the metal object."
