Problem exporting .obj

I have problem when I’m exporting model to .obj.
Whole model looks weird. Could you help me please?

Than you in advance
Politika model konacno.skp (8.1 MB)

Do you have the faces correctly oriented, with the white facing outward?

All faces are correctly oriented as you see on picture. I uploaded also skp file you can check it

You have the model at a distance from the origin. The fact that you moved the axes does not help.
In Blender, the imported OBJ model looks fine.

I saw the file, but I was not at the computer.

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Maybe the problem is in Microsoft 3d viewer. Shading and lights. I will see…