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Discussion Starter · #1 ·
I recently installed a bunch of recessed lights in a family room ceiling. The ceiling is swirled plaster with silica added. There was previously a single light fixture in the center of the room. I removed it and capped the electrical box. However, there is a black line where the old light fixture was and it is dirty on both sides of the lines. I've tried everything to get it off - bleach, Fantastic cleaner, TSP, etc., and nothing works. I am hoping that the members can give me some suggestions.

Thanks to all.

Ipswich, MA
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