reflextics - well the shiny bubble wrap type stuff

[Snikwahjm]

Ok my first stupid question. We got some of the shiny bubble wrap stuff. We cut it out and fitted it into the van windows. We had to add some magnets with you guessed it duck tape. Well, after a few days in the sun, the magnets and duck tape parted company. The shiny stuff also reflects light off the parking lot lights at the Walmart no matter what. Then it is obvious from any distance that there is something weird about that van, not that there aren't other weird things about that van.... Ssssooooo I covered a couple covers with some nylon fabric. It looks ok inside and out. Magnets are secure. My stupid question is this....

Does reflextics work ok next to a window if the shiny stuff has been covered in fabric or does it need to shine all over the Walmart parking lot to stay cold/warm in there? Opinions please. I can't tell, seems hot as ever. No didn't cover the front yet.