Use masking tape to outline your tub- surround area. The plummer assisting mentioned that the ceiling should be done to prevent moisture from getting in the ceiling.
Liquid-Tub-Surround was used on this exsisting tub that had a ceramic splash guard. Masking tape was used to expose only a quarter inch of the tile. The drywall was scored lightly, and then TSP was used for clean up. Steel Grip Prime Coat was applied to the ceramic tile and exsisting drywall,as well as the paint cracks.
With work completed we now have a shower where a shower never exsisted. Total work time was 45 minutes.