I got tired of the heat myself so I decided to paint mine. Some have said that if you paint it, it will black it out. Well, I tried Krylon Fusion Gloss White paint on some plexiglass and it let light through. So, I taped off the roof and painted the skylight after I cleaned it well. This is a pic of the inside around 11 am with the sun directly on the camper. The reduction in heat was amazing and from the outside, it matches the roof.
2012 Sandpiper 365SAQ weighing @ 15k, Onan, 2nd air, slide toppers, TST
2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'