New cylinders, cleanup on aisle 3 in Convertible Topics Posted July 25 I Used a putty knife, flathead screwdriver and any other type of chisel to lift the heavy grime off the surface and within the corners. Then I used 'Finish 1 - FT200'. This was also called 'prepsol' in the early 70's and 80's. Apply with a rag and dry before it dries on its own. Be sure to have a lot of rags, as they will become black very quickly from the grime on the floor.