The other day I had a look at Mark de Smetís Page spending some thoughts on how to create high quality reproduction overlays.
After some modifications to the process like using hot laminating technique and painting the white background by hand hereís the result (actually some reflections on the overlay due to the light conditions):
It took me lot of trial & error to find the best technique. The Overlays are now 350 Ķm thick which comes close to the original ones. I have to measure some original ones if I get my hands on them(shame on me not possessing any original Overlays...).