On Sun, 16 Apr 2017 12:19:55 -0700 (PDT), wrote:

A covered car lasts a lot longer in terms of the paint and top coat. Shingles on a house protect the house from not just rain but the sun too. The suns rays do a lot more damage than you realize.

We know that. You declined to answer the question:

"Anyone make a grill cover that will last more than 1 season?"