Very similar to "chattering", a technique in pottery for adding surface texture. In that the surface marking implement is used in a way that elicits rapid recip

Very similar to "chattering", a technique in pottery for adding surface texture. In that the surface marking implement is used in a way that elicits rapid reciprocation leaving a periodic pattern in the clay surface. Examples, https://youtu.be/FBxhkRu9imA https://youtu.be/FBxhkRu9imA using a long springy tool, https://youtu.be/W_P-L0axcqs https://youtu.be/W_P-L0axcqs using a short tool that pivots.