it has all the earmarks that the varnish to the paint reacted with making you the color varieties that happened to me once with a nail varnish malabu.
to find photos of the cabin Do17Z this complicated since there is not much photographic material from inside the cockpit, I have a project in hand but a scratch Do17z2 and almost all the material I found online, all books I found the cd luftarchiv.de and a special device with maps of the box but the cockpit rather little 3 or 4 photos that appear in the books or the Internet, but for example, to see the riveting intention can only be seen the cockpit.