I painted mine black after watching that a few months ago. I didn't see any difference yet since it was winter but. It sure hides the intercooler. Total sheath.
I think its pretty common sense. How would adding a layer of paint, help? Thats like saying, if you put a blanket on(or more clothes), you would be colder, does that really make sense to you????
The second video didn't discredit that the black paint didn't work because it did work with out air moving across it.. The second video was saying they were wrong in the since the design of heat removal was wrong.. I forgot what styles he mentioned.. Think it was conventional vs radiant? Don't quote me on that.