Does polished concrete stain?
It can. Concrete is porous, so oil, wine, coffee, acids and harsh cleaners can stain or etch it if they sit. A guard or sealer applied after polishing makes the surface much more stain-resistant, but spills should still be wiped up quickly.
For floors that see a lot of oil, fuel or chemicals, an epoxy or polyaspartic coating is often the better choice.
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