On older acrylic that has sat around for long periods, if you find your acrylic mask tape annoyingly catching on the edges, then peel the edges quickly using a plastic or metal blade. Sometimes removing acrylic mask paper is difficult if the acrylic has been sitting around a long time, stored in areas where the paper mask glue has adhered with the plastic too much. Use a plastic or metal blade to loosen the edge and makes for quick removal.
You will not scratch the plastic surface with the blade if you keep the blade flush with the surface. This is a fast way to remove mask from the edges for a quick mask peel.
