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How to Unwrap All materials?


hello
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Hello, I have hi-poly model of the car, I need to make UV map to be able to import it to UnrealEngine. Currently, I have the model, but I made a mistake and forgot to check SeparateUV for each material and it made me everything in one UV. This way I have exported OBJ file and imported back to 3D-Coat and tick "Separate UV for materials" (don't remember the exact name), so now I have to go through each UV material and click Unwrap to re-unwrap this uv again, basically it just scales what I have before. Is there any way to click Unwrap All and it will go to each UV map and just Unwraps it? How about that? 

Thank you.

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6 minutes ago, hello said:

I'm, only using .fbx format, do you want me to share you the file? 

Yes that would be helpful so Carlosan and I can take a look at it.

Edited by digman
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This is a test file, when I importing this .fbx to 3D-Coat and checking "Treat materials as separate textures" and I see list of materials then I click Okay, it's performing auto-map, when I want to switch to other UV, there is no other UV, they all got collapsed into one UV. It been happening 99% of the time. I don't want to have one UV, I want to be each UV unwrapped to 100% of the space, not to only UV-space (single UV map for the entire project), I don't need that. Please review.

http://dropmefiles.com/d8jAw

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