Cut Lexan with a small table saw for straight cuts, use a jig for curved. Sand the edges smooth as you can with progressive paper. If you want the edges clear you can get a small butane/propane torch and quickly flash the edge and it will look almost polished. Practice on how long and how close to keep the flame on the edge on some scrap.
BTW I dont for the life of me why you would want the deck clear, the main purpose of the deck is to hide the spaghetti. Scotty