I'm creating a model of a printed circuit board. The board consists of the plastic surface with copper tracks and features on top of it (see screenshots).
The grey board is a part, and the copper tracks are made up of different features within a single part in the assembly.
I need to model a coating over the top surface of the board (as I've hand drawn in green on the section view) - so I need to create a surface by offsetting the horizontal surfaces upwards, and offsetting the vertical surfaces outwards and upwards if that makes sense. I'm presuming the surface coating would be a new part within the assembly.
Does anyone have any idea how I can do this?