Zbrush Brush for enhancing edges...?


I have a scan of a rock. Usually the various edges of the rock are not that sharp (happens to all scans to a degree). I would like to “enhance” the edges of the rock so it would be more “sharp”, like a proper edge and not as a smoothed edges (due to scan blurrines to a degree).

What Zbrush brush should i use for this? I dont want to spent much time on it i just need one brush that would let me “enhance” the edges, or more “exaggerate” them… ? Is there some brush or a tool or a script that would help me? SOme brush has to be there… ?

Thank you