Hi,

I am trying to modify an imported part from a customer so I haven't got access to any features in the tree. I am trying to model a lip around an opening for a door in a plastic moulded part. The part was modelled by the client using surfacing and I am not too familiar with surfacing so was wondering if i could sweep around the door to create the lip. I have tried lots of ways and can't find one that works how I want it to. I have attached an attempt so you can see what I mean.

Any suggestions would be much appreciated.

Thanks.