I've never heard anyone suggest a UV protectant product by name that will work.
On a similar note, I've heard that moisture has alot to do with how fast things re-yellow, in addition to heat and light. I've read of people that had stuff in cool closets that re-yellowed, and the only factor was higher than nominal ambient moisture levels. If this holds up, it would be a major problem for me, as I'm right near a large lake, and the ambient moisture in my place is 65-70% year round.
On a similar note, I've heard that moisture has alot to do with how fast things re-yellow, in addition to heat and light. I've read of people that had stuff in cool closets that re-yellowed, and the only factor was higher than nominal ambient moisture levels. If this holds up, it would be a major problem for me, as I'm right near a large lake, and the ambient moisture in my place is 65-70% year round.