The girlfriend and I bought an old house and the floorboards are in brilliant condition so we've decided to sand them, stain them, and varnish them.
As soon as we took up the carpets we noticed expanding foam everywhere. The problem we now have is that around the edges of the two rooms and hallway we want to sand this stuff is stuck on there. I'm guessing it's been on there for a few years at least. I don't want to run the sander over these areas incase the foam is hiding some screws or something that will ruin the machine, so I want to find out how I can remove the foam from the boards so I can then sand them?