Hi. I'm purchasing an old farmhouse built in 1900-1910. The foundation is old sandstone, and you can see the wood flooring from beneath between the joists (no sublfloor). I know these old houses are built with the wood floors (no subfloor). The flooring under the carpet is painted and looks to be about 4 inces wide or so. I'm wondering if it is finishable hardwood- whether I can sand it and make it nice or if it is not "that type" of flooring. How can I tell if it is finishable?