They ONLY supply the parts to be processed. We own and control the materials/chemicals.
Gman,
Then your management system should be helping employees to design and deliver excellent coating and plating services. Your advisory services are also designed.
Of course, this includes caring for and keeping track of each customer's items before, during and after coating.
For your services to fulfill and satisfy customer requirements you'll be advising customers on the necessary condition of their items before they can be coated or plated. And you'll be prepared to treat or reject items that cannot be coated or plated to the customer's spec.
John