my Botcon Mirage has been in my display case ever since I got it, and he's the same color he was when I got him last summer. *shrugs*
If your home has newer windows they should have a UV coating on them already i heard .. if not there was a UV coating you could put on them i heard as well .. Kinda like how you would add tinting to a cars window.. I thought about getting that cause it would be a hell of a lot cheaper to add that to my windows then to go and pay 20$ or more to cover each toy lol ...