I know that this subject has been aired before but the term DLC or PVD is too short for the search function. Also, there may be something more recent that would be helpful.
I have a couple of projects in mind. The first is one of my Heuer Pasadenas that was seriously scruffy before I bought it and has gotten worse over the years. It's time for a service anyhow and a refinish of the case, new crystal etc would be highly desirable. The second is a long held hankering for a black Speedy Pro and I happen to have a spare case in my parts box, so it seems a no brainer.
The question is, does anyone know of a facility, preferably in the UK, that does this type of work? Any advice appreciated.