Meshmixer take surface from object

[jonask 0]

Hello makers!

Im trying to getting more into Meshmixer beside Supports.

I found a nice .obj file from a Mustang online. But its not really sliceable. It got alot of stuff in it and the hood and doors for e.g. are single parts.

How do i make this printable with meshmixer?

I thought i could maybe only take the outer surface and thicken the walls.

Is there a way to do that or is there a better solution?

Cheers

Jonas