Thanks guys! I didn't expect much feedback on this.
![laugh :laugh:](http://www.primitivearcher.com/smf/Smileys/default/laugh.gif)
I waxed some of the pieces now, oiled others to seal and buff them, looks nice.
stickbender, I used ret iron pigment. but since the clay containes (black and yellow) iron too, the effect is only slight on the burnt stuff. I would like to find white pigment that is not chalky.