Ok if this is your first time,you've picked a challenging project.
Place grease proof paper on the edge of the wallaper which meets the painted wall.
Cut into the corner,then gently lift up the paper and remove grease proof paper,voila no paste on the painted wall.
I know you can wipe it off but paste soaks right into emulsion paint and will be visible so this is a neat trick to avoid the problem altogether.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!