I have a glass cabinet in my living room where I keep my TF collection. Since it's near a window facing East, it often receives the full glare of the morning sun on a clear day. I know sunlight causes the plastic to yellow, so how concerned should I be? We've all seen characters like Groove and Jetfire look like they've been urinated on, but is that the case for all recent Transformers? I thought perhaps the different quality of plastic would prevent discolouration. Will we still see Classics Jetfire and Astrotrain's paint jobs eventually succumb to the power of the sun?