Klinkerumpf, as applied to the D-III, was made by laminating strips of plywood over a shaped form of the fusleage. The strips were soaked in water to become pliable, then bonded with a brushed-on glue. The first layer was aircraft silk, then wood strips, silk, wood, silk, wood and then a cover layer of silk, which I left off mine to show the laminate better. Pfinished Pfalz Pfighters were delivered with an overall silver paintjob, as you astutely noted. My version of that color was a mix of Steel and Gunmetal grey to get a weathery look and knock the glare down a bit.
As for the other colors and markings .... I know Eduard has a Werner Voss version of the fighter that looks nothing like this. I believe them to be wrong, based on the book I have as well as pictures of a captured Pfalz D-III that looks surprisingly like Eduard's version. It was not Voss'. I'll get the information from my book and possibly even post a picture or two. Of note, however ... this is not Voss' assigned aircraft, but rather one he was known to have flown numerous times and even scored some kills with.