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Protecting lead ?

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Anyone any ideas on protecting lead from discoloration from using hypochlorite ? I.e. lead flashing or roof valleys ?

 

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I thought I had a customer that has discoloured lead for some time - over a year because of hypochlorite ? Maybe that isn't what caused it.

 

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there is something that restores the lead, oxalic acid rings a bell but i cant find the thread now

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I've not been doing this long enough to comment on long term but ..

It goes brown first then the Brown dissapears in hours

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I have a bit of lead spare, I'll try some hypochlorite mix on it.

 

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I've not been doing this long enough to comment on long term but ..

It goes brown first then the Brown dissapears in hours

 

 

Doesn't go away. This is my porch I done a test around last May. Like. That ain't going no where

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Oxalic Acid can be used for rust stains, never tried it on lead though and its dangerous stuff! ive used 2% hypo on lead many times without any stains

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