I do a lot of FEA with multiple weldments. Usually I'll set the default contact type to separation, generate my automatic contacts, then I'll select the welds for each of the weldments and set those to bonded. The problem comes up when weldment A is resting on weldment B, and there's a weld in one part that's touching the other part. When I set the welds to bonded, I then have to go through all the other contacts to find all of those unwanted bonds and change them back to separation.
It would be really great if there was another contact type, or even just a checkbox or something, so that when you set the contacts to be bonded, it would only bond within the subassembly where the welds are located.