I am a native Creo (Pro/E) user using SW for the past 8 months or so. I used to do a lot of surfacing in Creo for my previous job for nesting and part contours. you could make things independent once you have the surfaces you want. i would like to do this in SW so that I could get a general shape, move on, change something higher up in the model tree and not have it break things that follow it. Thanks!
I used Pro/e (R9-WF3...and some Creo) There are so many ways to break links or get away from the parents.. the best would be to just export or save the bodies out as parasolid and reimport them... or, copy the bodies or copy the surfaces..
..but if you want to keep the link and want to get out of the part file and just work on the base geometry in another file,.. open a new part and do a "insert-part"... like "copy_geom" you can choose what you need.
Edit part. Right click on part in history tree. External references, break all. Model will be fully independent then and no longer linked to the reference geometry you might have used to offset or trace.
Note you would need to have the reference geometry in a separate part. You can do this in an assembly.
I do this on some injection mould tools that have been made and need further mods down the line. It guarantees less rebuild time and more importantly nothing that has been machined before can change in anyway.
Are you creating a solid from the surfaces you created and then looking to modify the solid by changing the surface contour/shape? If so, I would expect it to work provided that the surface change is not sufficiently radical to disrupt the resultant solid. If you have created the solid by knitting the surfaces, give it a try by using the "Intersect" command instead of by knitting and creating a solid.