on Oct 29, 2016 at 3:24:11 pm Last Edited By Roei Tzoref on Oct 29, 2016 at 3:32:18 pm
interesting challenge. why wouldn't you just re-paint the stroke all over again? you can't directly edit the path of your brush paint stroke like you do a mask or shape path. but since it's a path, you can copy it to a mask path and edit it as mask path and extract bezier handles to vertices, and when you are done - copy paste back to the brush path
you can even link the two via expression and keep Ae mask or shape editing capabilities with the brush paint workflow for whatever reason. maybe you are better off using the stroke effect if you want to manually edit the brush paths and dismiss paint brush for this one.