I agree that the most highly polished Alu
has nothing against a pure white paint when it comes the reflectivity and
absorption rates of sun light. I just do not know where this myth comes
from.
Udo

Clear reflective metal absorbs less heat than any paint, even white.

A club member painted his bare aluminum tube type trailer white and noted
that the decrease in heat buildup was very noticeable. Apparently, YMMV.

Tony V "6N"