Hi Pilou,

> Or the script if I want keep my models with not yet colors attributed ;)

You don't really need the script for that either - just select the objects that you want to keep and use Ctrl+C to copy them to the clipboard.

Then do File > New to get a clean start, and then Ctrl+V to paste those objects back in again.

Also another way to do it is to select the objects that you want to save and use File > Export to write them into a file, when you do Export it writes the selected objects to a file and in that file the only styles stored will be the ones that were used by those objects and not the full style list unlike "Save" or "Save As".

- Michael