Yellow Staining-Synthetic(not-metal) bathroom bath

[dohouch]

I think these baths are polycarbonate, if that makes any sense to anyone. It's not that old about 7 years, and more uesd as a shower. This yellow staining is a bit like a "water-mark" as in money watermark. That is that you have to look at a specific angle to see it. It's not just in the bath, but also on the ledges, horizontal surrounds. have tried to remove with Cream-cleaner, and also with toilet cleaner, thinking it might be something in the water. Anyway all of these made no impression. Anybody removed similar stains.
thanks

 

[Sue Ellen]

Domestos or Parozone are stronger than cream cleaners but make sure you use rubber gloves.

When what I call hard water marks appear on our bath I use a Brillo pad so one of these might be worth a try.

 

[Rose]

Many years ago in London we had a similar problem when we moved house, my neighbour asked her dad who was a plumber what I could clean it with and he said "spirits of salts" which I bought in a local hardware shop but maybe such things are not available any more