I've also never used it in a can (I need to pick some up!
).
The holographic is one of those paints I use a lot just to add a little something to a base color to set it off and say make you think "hmm, what is that?"
Here it is backed in black (rear of the body). Of course, to see the real effect you would have to have it in front of you and see the color shift as you move it around.