Hi, Someone asked me about putting one material "on top of another" as I suggested when I made my car paints, so here's how: Create 2 spheres, like this: (see pic)

(or select the car body and copy it) make the copy slightly larger than the original, and make sure it is on top of the original, not beneath it.

This pic shows 3 examples, the ball on the left has just the blue car paint on it, the ball on the right has just the speckled blue glass only (meant to go on top). The ball in the centre has a sphere with the blue car paint sitting just inside another sphere with the speckled glass on it.

Here is the same effect with me duplicating the car body and having the blue car paint on the original and making the copy a little bit larger (as small an increase as you can manage without being impossible to position) and positioning it on top of the other (original) car body:

Oh, and I used IBL on this one as well.

Just to show the positioning, here's a wireframe of the spheres:

Very nice technique....  

A BIG Thank You Fran...

Ah, the ol' "clearcoat" effect. I think that's buried deep in the galleries somewhere. But if somebody finds use of it, all the better.

You can really get a sparkle paint job if the "undercoat" is actually a grainy bump with high specular. (And perhaps aliasing disabled.) Looks like the gel-coat flake paint. But it's tricky to get just right.