Andrew--How do you like the Lund silver box? I was thinking of buying the 8x10 because I like the idea of a bath that seals with a gasket. The cool pack attachment is interesting--I find the process is the most difficult to control in the heat. Personally, I'd just varnish the box with extra coats on the bottom panels and around the silver box. The natural wood will look better and the wood is light, so white won't be appreciably cooler for the outside, and the inside will be more pleasant if it's light colored.