There is a commercial foam back rug glued with brown color mastic to a Vinyl Block floor the room is 17'x21'. I want to pull up the rug. Is there any type of stripper or anything else I can use to remove mastic. I would like to install a sheet vinyl (without the glue) over this and I just need it smooth. The sub-floor is level and in good shape. Contractors I have tried to get to do something only have one answer-Build up floor or rip up everything. Then they don't come back, a bothersome job. Please help.