That trailer was sort of a glue bomb sitting on the shelf for years, so I figured what the heck, I'll try foil. This was before Alclad became popular. I took regular household Reynolds aluminum foil and sprayed the back with 3M spray adhesive, but only on the foil, not the trailer in case I wanted to remove it. Stuck it on and it's been stuck ever since. If you try that on something smooth and flat, you might be able to see the texture of the adhesive underneath the foil. If it was a new build and I was going to do it again, I would use Alclad or bare metal foil, let's the details show better. I priced getting the sides chromed at Chrome Tech and it was way too expensive. I've been using chrome Alclad on a couple of fire trucks I've been working on and it worked out pretty good.