I came across a Porsche Club of America video that details the PMB process end-to-end and loved the behind the scenes details:

The caliper wizards at PMB Performance are the best in the business, and they were fantastic to work with on my restoration.

When the original calipers came off the car, they were filthy and in desperate need of restoration.

PMB restored and repaired them to maintain the originality and they came out looking nearly as good as new.