ATTACH the panels with a combination of pure silicone and slow-setting (sets in two to four minutes) hot glue. The hot glue lets you avoid clamping. First, clean the dust from the back of the sheets with alcohol. Then, apply a thick bead (1/4 in.) of silicone 1/2 in. from all edges (including holes) and in 1-in. globs about every 12 in. Get the panel almost in position and apply the hot glue at all four corners and at the midpoints of edges longer than 48 in.