Hello -
ALL prepainted aluminum used as trailer side wall sheets on the market today have baked on paint with a thin poly coating acting as a clear coat and UV protectant - treat this lightly -
NO high pressure wash, NO harsh chemicals, NO black streak remover
a coated of high quality car wax at least yearly - wash with car wash concentrate and a soft brush, rinse very well…
when you see black streaks wipe them off with a soft towel, if left sitting they will stain your trailer
If the poly / shine coat is damaged it is all over and will not return
Congrats on your new rig
Risa
HappyTrailsTrailers.com
BalancedRideTrailers.com