http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/max-ernst/hidden-damage/hidden-damage-schematic/?redirect_url=title%3DPr%3Ft%2Fcomponents%2Fcom_virtuemart%2Fshow_image_in_imgtag.php%3FmosConfig_absolute_path%3D

Kunsthaus Zürich

Hidden damage

This image shows a schematic part of the newer coats of paint (in red) on the lower row of panels.
This image shows a schematic part of the newer coats of paint (in red) on the lower row of panels.