If the case was on a planet with 2 suns, and no moisture, then the box would be heavily faded or yellowed, and if it was painted, a lot of the paint would be blasted off. The dust from the sand would be in the crevasses. A plastic case would probably be cracked or broken in places, depending on how long it was in that environment. If the case was used often, it would most likely have been repainted and repaired several times, leaving somewhat of a patchwork of faded paint all over...lettering half obscured or worn.
TazMan2000