I do use clear packing tape over the pattern. The trick is to apply the tape tightly without air bubbles. Do not wrap. I then use a small block of wood to burnish the tape to remove any air bubbles. With the tape tightly applied, you won’t get any sawdust under the tape. A far as glare, I use a lighted magnifying light and an additional light to the side of the saw table. With this setup, I don’t get any glare.