As long as I am here I might as well ask, any experience or ideas for making an enclosed, black, auto trailer low maintenance?

So far I am thinking of buying bulk rolls of 5' 3M or Suntek protective film and have some commercial window tinting guys put it on or do a few sections at a time with some help. I was rough quoted $7,000 for a shop that does Xpel and some others! Seriously it's big, flat areas with nothing to trim, it would be new so I don't see a need to polish it, maybe clay it so I am just getting ideas at this point, white would be the easiest route but doesn't match anything!

Pretty much like this one, the lower 18" has stainless on it.