Hi Stefan.

You're welcome!

@You : "...Is this also somehow possible ...(in an automated way, without painting with brushes) ?"

Well...this is a bit tricky I think!
For what I know there's no completely automation for this kind of things in 3DCoat.

But one of the things that you can try and that is semi-automated, is using one specific tool in "Paint Room"

That tool will allow you to decide on what "kind" of surface you want to paint on (or freeze).

This is a very coarse and rough tutorial I made on the fly : http://take.ms/wjnlsC

You can start with it and make practicing on that tool.

Ciao!