coloirish-FYI-are the corners of your current tub surround curved or a fairly square corner? If they are curved keep in mind that if you buy flat sheets, you will have to either remove the curved surface or figure out how to curve the replacement panels. I've installed many of the new bath/shower "plastic" panel kits, either over existing panels of many sorts, over sheetrock (yes on a bath wall with shower), and all sorts of walls. These new "plastic" panels can be cut to fit, just plan ahead and allow an overlap. All "Liquid Nail" type construction adhesives cannot be used with these new "plastic" panels. Read the construction adhesive and they will tell you if they can be used with these panels. I use only a bath type caulk for the panels that contains a high amount of silicone, for adhesive purposes and mold resistance. Proper planning, proper fitting, will lead to a good installation that will last a long time. Good Luck, David