I HAVE REMOVED THE LANOLIUM FROM OUR CONCRETE FLOOR IN THE BASEMENT BUT THERE IS STILL SOME UNDERLAYMENT FROM THE LANOLIUM STILL ON THERE. HOW WOULD I REMOVE THAT SO THE CONCRETE IS SMOOTH ONCE AGAIN. I WOULD LIKE TO PAINT THE FLOOR. DO I NEED TO CLEAN IT BEFORE I DO THAT. IF SO, WHAT DO I USE TO CLEAN IT?