1. Cost
2. Ease of application/Normal spray eqipment
3. Reach spots that cannot be reached by vacuum deposition
4. The metal deposition is UNDERNEATH the plastic which means it will
pass all performance testing.Basically nothing can attack the reflectivity
as it is totally buried.
5. The metal can then be coated with a conductive or non-conductive
over-coating
6. Every paint line can
now be a plating line