Alright, the clear has dried, so now for the 2nd test pix! 
First, I'll start with the Metallic Clear over Duplicolor and hobby laquers.

Here's the Metallic clear in the can. Almost looks more like a pearl silvery-white once it's mixed up.

Over GM Metallic Black.

Testors Laquer System Gloss Black

Tamiya TS11 Maroon
I'm pleased with how it looks on these colors, especially over black. This clear seems to have a bluish tint to the metallic in it, which tends to make it not work well with certain colors. As before, no problems using it over hobby laquers.
Now for the next test. For this part, I used hobby enamels (Testors), 1 spray can and the other airbrushed, airbrushed Auto Air Creatix, airbrushed Tamiya acrylic, Kustom Kolor spray can enamel, and just for giggles (and because it was handy) Valspar John Deere Green tractor paint.
One difference I did this time was to split each spoon into 3 sections. The top has the Metallic clear, the bottom is the Prism clear, the middle was left alone for a test of just the regular clear on its own.

Model Master Magnese Brown spay can.

Testors Boyd Grape Pearl. I was very impressed with how this one looks. This one was also my first attempt at using Donn Yosts method of using cheap laquer thinner for enamels. I have to say, it works!

Auto Air black.

Tamiya X-13 Metallic Blue. Again, first time spraying Tamiya acrylic. I had a bad experience spraying water base paints in the past, so was reluctant to try it. After this test, I will be using more of the Tamiya acrylics for spraying in the future.

Valspar JD Green.
I saw no lifting or wrinkling, so I would feel safe using the Duplicolor Clears over hobby enamels and acrylics. As with the earlier test, all the airbrushed paints were shot with my trusty Paashe Model V dual action.
One more note I'd like to add, the Prism and Metallic clears are intended as a mid coat, and should be cleared over. While they do have a decent shine to them, they do have a slight texture that needs to buried in regular clear.
I will no one more test, shooting a Kandy over the Metallic clear to what effect is makes. Then It'll be on to an actual Guinea Pig, namely the Dirty Donny Chevy van.