The black hoods up here are for the sun. Good reasons for that.
Due to the nature of being at such a high latitude the sun tends to go "around" the sky. Where-as on the equator the sunset takes about an hour our sunsets last for a few hours.
It's almost Winter Solstice right now and sunrise turns right back into sunset.
Driving south on a highway in winter just assures you will stare into the sun from 10:30am to 3:30pm Driving North on a highway in the summer and you stare at the sun from 10:30pm to 12:00am and then 3:00am to 5:30am.
help with keeping engine area warm thats what i was told when i asked a friend who lives in alaska.
Common knowledge is that this would work as we all know black absorbs light the best and warms up fast but the reverse is also true. Paint two hoods black and white, warm them up the same temperature and put them in the dark and it will be the black hood that cools off the fastest.
All in all, I hope this helps. My Vic is from Wisconsin and I keep debating painting the hood black myself.