Q–When I was applying a polyurethane finish to my bedroom floor, some of the urethane spilled onto a marble slab that separates this floor from an adjoining bathroom floor. This has hardened, but I ...

Q–When I was applying a polyurethane finish to my bedroom floor, some of the urethane spilled onto a marble slab that separates this floor from an adjoining bathroom floor. I want to remove it, but it ...

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Has anyone had a good experience removing polyurethane from concrete? I got a quote of $1000 – it’s a very small area. Anyone been there, done that?