We are removing a linoleum floor that was put in around 1993 or a couple years prior that is over older linoleum from the early 1900's. The older linoleum is actually very pretty and looks great. The problem is removing the mastic and the paper stuck on top of that from the newer linoleum. Does anyone have any suggestions in a mastic removal product or procedure to preserve the older linoleum? The mastic is asbestos free.