Get vertical..

..then the sun only burns the top ..
Ever seen the old surf board photos of dudes standing their boards up in the sand ...
Limited sun rays and ya wax doesn't melt off .
It's only a suggestion .
Find a coconut tree .just make sure they've cut the coconuts off ...makes a friggin big ding in a car bonnet ...don't ask

Put it underneath the car out of the sun is another fantastic idea.

Merry Christmas Jason .