White paint is good, but only has a coefficient of reflectance of .8 , meaning that its only 80% reflective. But Mylar(aka extremely thin layers of silver/aluminum on any of a number of polymers) has 2 good properties. 1) contains all UV energy/rays and is about 97% reflective, having a CR of .9

But white paint is very easy to get, install(paint/spray), and manage. If it gets dirty, put another coat on it.

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ForgetClassC Reviewed by ForgetClassC on . would mirrors work?? I am currently in the process to spec out a closet and get it ready and was wondering if I could use mirrors on the walls for a reflective surface. Is this a good idea? - would just use mylar however I don't know where I can purchase some in my area and not really wnating to order online? Rating: 5