I have made window covers out of cardboard,,, we place them in every window when we are not using MH,,, even the windows in the cab !!! We then pull the shads down part way to hold cardboard,,, just last week I painted then all white on one side !!!
Remember,,, dark is COOL !!! Even in our homes !!!
I do think I like the Idea of painting Sky Lights !!! Krylon Fusion ???