Generating surface or body from polylines

Hi everyone. Im new to Rhino but have taken on quite a large challenging project as my first time with no real help or guidance. Im trying to export this as a Parasolid or step file into power mill so I can CNC it. How do I generate a surface or body from these polylines? As you can see there is a number of points on the polylines. Would anyone please be able to help?

Any help would be unbelievably appreciated as I have taken quite some time into trying to do this but not break through yet and it has to be possible.

Scaled M3.3dm (14.3 MB)

Where’s that data from?

Assuming you don’t mind changing those curves slightly, it might help to rebuild them with less control points…your resulting surfaces might be cleaner.

Maybe @Rhino_Bulgaria has some car modelling tips for you.

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So the data is of a model of a BMW M3 G80 I scanned using a renishaw series 2 cyclone device. Im more than happy with you making edits if needed yes. If you could outline the edits so I know that would be great. Thanks