/3/ - 3DCG

>>940718
>>940736
You can try to delete only the recessed vertices and fill the holes with faces. It won't be perfect, but that will preserve the curvature better than trying to match it by hand.

Hide everything you're not working on with H and then go in from the side in xray mode to select the recessed ones to delete, unhide alt+H. After that, patch up the holes with ngons the best you can by selecting groups of verts and pressing F. Recalculate normals with shift+N when you're done.
ngons probably don't matter, but just in case select everything with A then go to face menu in the top left and triangulate faces.

Should give you the result you're looking for