I have used black sharpie markers as long as the bark isn't dark they work ok. I have also tried using white paint markers on dark bark but the paint doesn't seem to flow well enough to get a good mark. I have even used the paint sticks you can get at a feed store that are normally used to mark livestock and they work (sorta) but are messy. What do you folks use when tracing around a circle on the bark side of a log to cut it into a bowl blank?
Thanks