Here's the scenario. I'm kind of impatient, so I make some sort of multibody part model for some sort of analysis and I don't think to assign materials properties until I get into Simulation. I then assign materials, but then I want to run another simulation on the same model, and then I wish that I'd assigned the materials at the model level so that any subsequent simulation would inherit the model materials. I then go back and assign the materials at the model level. To ensure consistency, I want to use just those materials in the simulation that I've already defined. However, the materials that I've assigned at the Simulation level stick and I can't figure out how to remove them. SolidWorks help shows how to remove the material from a single body part but not a multibody part. Can it be done? I seem to remember in the past there was an option to explicitly assign the material from the solid model, but I can't find it now.
I'm not 100% sure about this but if you have one scenario set up and RMB click on the tab and 'Duplicate' the tab, all that data should show up in the new tab. It also appears that within a tab you can CTL+click on multiple parts and then RMB on the highlighted parts and change their material.
I'd be curious to hear if that works out for you.