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 ...