It may sound strange, but the biggest danger is sun damage of the decals. Otherwise, wax should be enough. Expect to replace the inserts in a few years.
I forgot to mention that you can also use a cover like the Calmark from the cover thread.
'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 DS, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Bags, Toyo M655 Gs, Curt front hitch, Energy Suspension bump stops.
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