Ahh the old plumber didn't own drop cloths , sounds like PVC primer
Seen this many times, try treating just the spot with methylene chloride,on microfiber
Then poultice and cover overnight ,use DE in your poultice, might take two or three try's 
But it will become satisfactorily removed
Best Regards
Scott Wilson
Wilson Stoneworks inc 

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Has anyone had any experience with purple staining on carrerra. It was found under a rubber mat in a bathroom. I removed most of it using 40% peroxide but there is still a faint bit of it here and there. Suggestions? Recommendations?

Tim Lesnar
Classic Marble Restoration 612.250.0041 (c)
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Mpls, MN
 
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