We were cleaning a deck with a 1% SH and soap mixture. Customer asked the guys to spray her antique 150 year old bathtub in the yard and brighten it up. (They are turning it into a fountain). Got a panicked call from the crew. Mixture turned the enamel in the tub brown. I need to make it white again. No amount of rinsing has helped. Ideas?
Cast iron tub?? I might just try some F9. Maybe it isn't a reaction to SH but what was left behind after the SH did it,s job and was rinsed. Wouldn't hurt.
