Floor finishes and certain chemicals in wood oxidize and are affected by ultra violet light sources. This may cause the wood and finish to change color and develop a patina or aged appearance. To avoid uneven appearance, move area rugs occasionally and drape or shade large windows.
A picture-framing vise, or miter clamp, has screw holes on the bottom for attaching to a workbench. But for occasional framing it can get in the way of other benchwork. A solution is to mount it on a wooden base that can be readily clamped and unclamped in your bench vise. The base can be of scrap wood, and made up so that the framing vise will be about chest high for comfortable working.