cleaning porcelain patio

6 months ago

Our 1 month old porcelain patio has a strange yellow staining that started on the bottom middle step and is spreading. The jet wash can’t get rid of it, but scraping with a glass scraper gets a little success.

Does anyone know what the staining could be and of a chemical we should try that won’t ruin the porcelain?

Thanks in advance.

Comments (11)

United Kingdom
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