The experiment worked perfectly. I now have an entirely red DK2 with absolutely no IR obscure. use 3M brand 3630 series, self adhesive, translucent vinyl. Excuse the rough look of the end result. I spent all of three minutes cutting the vinyl with a pocket knife and slapping it on the HMD. This was an experiment in utility first, aesthetics second. :)
Not a Rift fanboi. Not a Vive fanboi. I'm a VR fanboi. Get it straight.