Would you paint aluminum radiator?

Aluminum is funny.
Especially when thin.
I would paint it fins and all, but I live expecting heavy corrosive road salt.
I have watched aluminum fins in a fairly new recore literally melt away over a period of 5 years in a daily driver.
My choice would be all brass, always.
And if you study black body radiator concept, flat black rules.
Extensive studies in heat emissivity showed that silver outermost surfaces radiated the least heat, while flat black the most.
It did not seem to matter how many layers were present or what pigment they were, only the outermost layer.
This is common knowledge in steam heating.