say what ?
I can’t understand what you are trying to say
but the intercooler isn’t painted in black it is anodized black which is a special process of enhancing the natural process of oxidization on the outer lair of aluminum so no it will not heart the cooling capability’s of the intercooler but actually it should
help cooling because of the chemical reaction on the outer lair that changes the crystal form of the aluminum
anyhow its only a few microns thik
also it comes with other advantages such as protecting the aluminum from corrosion