Penelope: In my study at home (which has walnut paneling), as well on the gallery walls at the Carnegie Arts Center (which are painted with flat paint), I use a product called "Fun Tack." The material is produced under other names but is basically a gum-like material which can be applied to the back side of the label and adhered to the wall. It is reusable and completely removable from sealed surfaces. (A similar product is used to adhere glass, porcelain, and ceramic works to their bases.) The drawback to the material is that it will leave an oily stain on flat wall paint and paper. I have seen the oil penetrate a sheet of bond paper after about 7 to 10 days, yet it will not completely penetrate paper mounted on board even after 4 to 6 weeks. So, I would not recommend it's use without first testing it out on an obscure area of your paneling for at least a few weeks to determine if it will leave a stain. I have not had any problems using the material on the walnut paneling in my home; however, I don't know what type of varnishes/oils were used to seal the surfaces. John A. Vallerga Gallery Chairperson Carnegie Arts Center Turlock City Arts Commission