Restorations

Hi, I'm new to RVing and I bought a 1982 Komfort Lite 19 recently. It's in decent shape and I've been sprucing her up a bit with new rubberized body armor up front, sanding priming and painting the frame up front and adding a two tank propane system. Welded on a new flip up jack. I flipped the axles for clearance. I have to put on new edge mouldings (extrusions) all around on both sides yet. I'm also working inside. I've removed several layers of flooring (outdoor carpet, plywood, vinyl floor, plywood)to get down to the original plywood of the camper. I'm now rolling in a thick rubber floor "paint" to seal it up nicely and insulate a bit and adding a cove base to neaten things. Next I'll be priming and painting the walls, ceiling and cabinets.
I was on the top of the camper today and the roll on rubber roof coating is cracked and peeling in numerous areas. My question is this: What is the best way to remove the old rubber coating so that I can reseal the roof? Any help offered and any ideas for restoration are welcome! Thank you!

Matt