Thanks for the comment. Well, it's made of a self-made painter's filling (marble flour and binder) the colouring is made with pigments and wax. You have to let the painter's filling dry first. Just try out - the results are amazing.
Thanks a lot, I'm always happy when people like what I do. Have visited your site, wish I could paint faces like you. By the way started painting years ago with watercolour pictures a bit like your bird.