Rub the wall with 320-grit sandpaper or fine steel wool. Scratch the surface lightly to give the primer some texture to grab onto.
Wash the wall with dish soap, warm water and a sponge. Remove all grease and sanding dust with this solution. Rinse well and dry thoroughly with a towel.
Apply a 100-percent acrylic primer to the wall using a sponge roller for the main wall and a bristle paintbrush for the edges. Choose a primer designed for use on stainless steel. Allow the primer to cure according to package instructions -- at least four hours. Use a primer tinted to match your paint to provide better color coverage.
Paint the wall in the same way as you apply the primer. Use a water-based enamel paint. Allow the paint to cure according to package instructions. Apply a second coat.
Prepare the wall by roughing the surface with 320-grit sandpaper and washing it with dish soap. Rinse the wall and dry thoroughly.
Apply a 100-percent acrylic, adhesion primer to the wall using a sponge roller and bristle paintbrush. Allow the primer to cure according to package instructions.
Hang the wallpaper by arranging the wallpaper in order. Line the wallpaper up on the wall so the pattern matches. Apply a damp cloth to the wallpaper to activate the glue. Smooth the surface with the cloth to remove air bubbles. Trim any excess with a sharp knife after the wallpaper is completely hung.