Removing petroleum stains from hardwood floors

Markarlau
by Markarlau
I had a rug with a multi-colored foam pad. When I took the rug and pad up, the foam that was colored black stuck to the hardwood floor and had to be scraped off. It left stains which I guess come from a residue of the petroleum that must have been a component of the foam. Can those stains be removed? The entire floor is spotted with up to 3 inch stains
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