copy surfaces

Hi,

I have one question for today and I hope someone can help me. I have an import model with no features and I want to copy its surface so that I can work on it in SW. Copying surfaces is easy but my question is how do I copy the surfaces and be able to edit the surfaces as if the model is a SW model? Like if I need to change a surface's depth or tweak it if I need to.

Thanks in advance!

KN

SolidworksParts And Features