The ability to select faces in Fusion and apply different appearances to them is a very useful feature. The only problem is there is no way to export this data out of Fusion into another package. It would be nice if there were some kind of export one body per appearance group when you export .stl from inside Fusion 360.
This would be useful for myself so I don't have to go and manually select all the faces again in my 3D package to get my face groups.