If you want a hand lettered look without burrs from incising, Place a piece of thin clear plastic over the piece-smooth down well so no air pockets and it is adhering slightly to the damp clay. Place Permanent marker lines for guides, then use your pointed/slightly rounded tool to write. This will indent, not burring as you work. Leave the plastic on until after leather hard, and then lift. Works very well, even with wedge type calligraphic tools as long as they are rounded.