This is something that I have not personally done yet, but I have seen some really neat stamped walls. Have you stamped on your wall? Post a comment below if you have and if you had any problems when you stamped.
QUESTION: Ink ~ Can pigment ink be used for stamping on walls?
ANSWER: It is a possibility, however it is best to test on a small area that is not really well seen first and heat-set it. If the heat-setting dryed it it will work. It really depends on several factors, the walls texture, the finish, and what has been previously painted on the wall. Just keep in mind that acrylic paint is best for stamping on walls.