Refinish gone yellow?

I recently looked at a glider that had been refinished by Dave Nelson in 2001/2002. It has been in it's trailer, and hangar for the last 2 years and not flown. It is located in Texas. In the dim hangar lights, the finish seemed a very faint yellow. Could of been all the dust... It was glass smooth, with no cracks or crazing, but when I used a flashlight, in the dim light, it "seemed" slightly yellow. I live in AZ, and have been told that once I moved it to a hot dry climate, it would "perk" up and whiten up.. Any further thoughts on this?

Thanks