Toilet bowl colour change to silveryish

[checkmate]

Hi guys

Random thing. I have two toilets
One upstairs and one downstairs. What I've noticed is toilet bowl at back where flush water goes towards top has gone silvery colour. No idea what that is.

Can you guys advice what that is its happening on both toilets.

Usually domestos does trick but not with this sadly.

Is it something to do with water?

 

[magicmushroom666]

Could be the metal part of a bog brush rubbing on the porcelain.

Green scourer pad might shift it if that's what it is.

 

[Aquaheat]

Change of diet?

Seriously though it is most likely the above, when using a toilet brush you may be pushing hard and the centre of the brush (metal) is rubbing against the porcelain.

Jon

 

[Nige F]

Or use a Bath Rubber- about £6 on eBay. good for removing those metal marks on sanitaryware

 

[dilalio]

Photos?

 

[Jackrae]

Try some caustic soda on it - if it's aluminium (from water) the caustic will "dissolve" it