Is there a way to use Dynamic Paint to make a selection of vertices to then be able to delete in edit mode. I would like to use a brush to accurately select a specific shape from a dense mesh. Thanks in advance for any help.
No. While it appears to be possible at first, the data is only there during the simulation, going into edit mode clears it out.
I expect you will have to use border, circle or lasso selection to get the verts you want in edit mode.