I think thats for backlit
signs... which isnt what youre doing.
Do you not have a printer? You can print on white reflective vinyl with solvent / latex printers easily to make it whatever color you want. You do lose some reflectivity... but not much. If its a rush
sign, I suggest doing that. 3M Makes 5330 (Removable, printable), orajet has one... avery has one. All should work fine. If youre using something besides engineer grade... Latex can print on all 3M Reflective whites.
https://www.3mcanada.ca/3M/en_CA/co...ed-36-in-x-50-yd/?N=5002385+3293795407&rt=rud This is 3M Traffic blue - They also have traffic green. It's specifically made to let through as much light as possible. This is the onlything we'd ever put over reflective... We've never tried regular transparent, but I have a feeling itll block most of the reflectivity.
If you cant find the reflective you want, I highly suggest getting a wholesaler to print it for you. Then you know you're getting a quality
sign, and not something that "May" work. I imagine every wholesaler has a reflective they print on. lots of MM members on here who can do it for you.