Impasto paints on cards? Yes, I say, they are lovely and full of pigments and really easy to use.
Check out my videotutorial and you can see two cards, how I make them step by step.
Have used the lovely paperdolls from Tim Holtz in my cards.
Some Prima Marketing wax for some shine and intrest.
Also some stencils and stamps from AALL & Create. Here you see a closeup on my watercolor paper with texture and a love the patters that the paper makes.