Well perfect timing on this post. I was just about to ask the same thing. A buddy brought his Porsche by my shop last weekend to take a look at it. He had just gotten it, and knew I could make it look good (since all I use is Adams). It has the 3M clearbra stuff ALL OVER IT. Hardly a spot that isn't covered. And the previous owner took it through machine car washes so naturally, it looks terrible.
I told him I didn't think I could do much on correcting the spiderweb-orgy going on all over his car. And I was going to ask the same question.
It confirmed my thoughts, fine polishes only. Has anyone tried to remove this stuff off of a car before? I imagine the tacky residue is a nightmare.
Pics for grins and giggles.