This video shows the complete process for vacuum metallizing. The reason we need to prepare the pieces is that PVD requires very good surface to obtain high reflective finishing.
The machines we need for vacuum metallizing are as following:
1. Painting machine
2. Machine to uniforming the painting
3. Oven to dry the painting
4. Vacuum metallizing
5. Painting machine for topcoat
6. Oven to dry topcoat
7. Coloring machine(if required colors)