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?
Worst case you can have it recoated, it's not too expensive. Hopefully someone has a better answer for you.
Jeff Thompson said
Nov 4, 2013
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.
Chris Gunther said
Nov 4, 2013
Looks like rust. I'd try oxalic acid or F9. The Works toilet bowl cleaner would probably work as well.
Doug Rucker said
Nov 4, 2013
Chris Gunther wrote:
Looks like rust. I'd try oxalic acid or F9. The Works toilet bowl cleaner would probably work as well.
F9 or the works, I agree..
Barry Landis said
Nov 4, 2013
Oxalic Acid may bring it back. I had a similar instance earlier this year on painted aluminum siding (turned brown) and oxalic did the trick.
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?
F9 or the works, I agree..