Remove grading while keeping created surface

[tadthurston725387]

Is there a way to keep the surface that was created with a grading and remove the grading object? The surface deletes when I delete the grading that created the surface. I don't want the feature lines that are created with the grading object.
Thanks,
TT

[cadtag]

export to XML, delete original surface, import surface back from XML

But, why on earth get rid of the elements that define the surface? Be a real PITA to edit/change/tweak. To use the surface in a drawing, just DRef it in. The only thing that should exist in the surface drawing is the surface and the entities that define it.

[rmk]

there is a "create detached surface" command. select one of the grading objects and it should be on the contextual ribbon.