Lotsof us use lexan guards to watch what's going on while we machine until th we y gets crotched up to the point of being useless. I saw this trick on the Tormach users forum. Clean and polish the lexan. Take your time and get it nice.
Then on the side facing the chips clean an area and add a armored glass tablet screen protector. I then gave it a shot of "RainX". Made a huge difference there's 8 hours of cut time on that window in the pictue
