It would be very useful to be able to asign different materials to different bodies inside of an part.ipt.
Reasoning:
we are working with electronic engineers and they exchange with us their project as step file. This step file is an assembly with many parts and different pcbs. In order to keep things clean and tidy we derive their assembly in to a single part, multi-body part, as this helps to deal with BOM later on.
The problem is, because it is one multi-body part, the weight is being calculated wrong because pcb and electronic components have different masses.