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Old 10-19-2013, 01:26 PM
 
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The orangey stains on my bathtub is rust. However, the bottom horizontal part is covered with something gray - is that rust also, or some kind of mildew?

I used Bar Keeper's Friend on the whole bath and it cleared both areas. I would like to know what the gray stuff is anyway. Thanks.

Are there many other products with oxalic acid like BKF?
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Old 10-19-2013, 01:39 PM
 
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Could just be soap scum. Could be mineral deposits liberally mixed with ordinary dirt and soap scum. Could be some mildew mixed in too. Either way, it's gone, don't worry too much.
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Old 10-19-2013, 02:06 PM
 
Location: Vero Beach, Fl
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Take a look at a site named www.triftyfun.com - they have great remedies for your tub.
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Old 10-19-2013, 04:18 PM
 
Location: The Triad
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Quote:
Originally Posted by robertpasa View Post
The orangey stains on my bathtub is rust.
However, the bottom horizontal part is covered with something gray
Have you scrubbed it yet?
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Old 10-20-2013, 03:16 AM
 
Location: Florida
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Quote:
Originally Posted by MrRational View Post
Have you scrubbed it yet?
The very second sentence in the op.
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Old 10-20-2013, 12:24 PM
 
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I used Clorox bleach on both the tiles on the walls and the floor of the tub.
It worked on the tiles only and not on the gray stuff on the floor.
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Old 10-20-2013, 03:41 PM
 
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Like I said, soap scum or mineral deposits (scale) or both, with plain old dirt (mostly skin) and molds/mildew/bacteria mixed in. Both soap scum and scale are caused by hard water. Oxalic acid dissolves iron stains but doesn't do much for scale and soap scum, so it was probably the abrasive action which removed it -- probably mostly soap scum then, because scale is harder to remove. Bleach will kill mildew in soap and mineral films but won't remove the films.
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