Remove traces of filled holes


I’m trying to fill holes that I created. I’ve made a positive surface to fill the hole, done a boolean union and I’m left with a residual shape that I cannot select. Using “mesh repair” I can select them but not edit them. I’d like to return the surface to its original clean state so I can redraw some holes.

Any ideas please?



If the top is a single surface - deletehole should work.

Brilliant, Thank you Vladimir. All sorted