Oh yes!
Since the minimum order for 1/2" thick polycarbonate at McMaster was a 12" by 12" sheet, and it cost $17, I opted to get 2 sample sheets of 1/4" by 6" by 6" ($1.99 ea.), and glue them together.
Since my Devcon plastic Welder is cream colored, it would nullify the clear effect.
So I'm going with IPS Weld-On #4. It also contains Methylene Chloride (VERY NASTY!), which I can then use to seal the cracks in the drilled holes.
Voila!