[Wickd89]

JeremyD,
I totally agree. I think it is totally neglibible. If anything, it will insure that the heat gets reflected and discippated out the vent in the rear deck lid instead of through the car's interior.
Having taken thermo dymanics in undergrad helps me easily understand the properties of aluminum, but I guess we all learned the same rule when we buy fast food!

Thanks for the discussion.