As for the UV coating, I too am not 100% sure, I haven't seen it actually written anywhere that they are in fact UV coated. However, I too noticed there's a bit of a bluish/purplish tint as well, so it couldbe a UV coating or it could simply be the color of the clear plastic being used.
They should hvae it printed in the ad if it is in fact coated, it would be a great selling point.
I'm going to take my vintage POTF Anakin in it's protecto pack and sit it in the window all summer, I'll let you know come fall if it fades at all. ;^)