Believe it or not, but lacquer finishes need to breath. Putting vinyl or see through covers, glass covers, or some kinds of plastic covers on top of your dining table can damage the finish. Be sure that the cover has a felt or cloth protective side that lays on the finish, or put a felt table cloth underneath the vinyl. You can use felt circles that can be purchased at any fabric or upholstery supply shop, and put under your glass cover to lift it off the finish, some felt circles come with a sticky side to attach to the glass, be sure the sticky part attaches to the glass and not your finish.  Be sure the circles are spread out and evenly lift the glass off the finish.   Consult the manufacturer for information about your product.