I want to make some grunge maps (surface imperfection overlay graphics for 3D rendering) by photographing flat (not round) real-world surfaces. However, when I try to take pictures of reflective surfaces like windows and countertops that have fingerprints and scratches, I end up lots of ugly reflections of the photographer (me).
Here is an example of a grunge map https://www.poliigon.com/texture/1596
Is there some kind of studio set up that allows you to take pictures of surface imperfections without reflections or transparency interfering? I have a DSLR, but I don't really think that the camera or lens should matter too much.