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Discussion Starter · #1 ·
I inherited a concrete patio that was stained only a few years ago. I don't know what they used for stain or the process but there's an area that the stain failed. My guess is it never fully dried and the sprinkler system was hitting it. Can I just stain right over the whole patio with a similar tint or do I have to treat the existing stained area before going over it?
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