Well, I tried completing it. Not that good as I hoped but not that bad either.
It's untextured but here are pictures. The spoiler was the best part of the car. I made that before the car.

Hi, I didn't do very good at tracing. could someone please clean this up for me?

EDIT: I remade the trace. No need to clean it up now.

EDIT 2: I can't seem to get this working. Can someone please fix the problems and possibly finish this?
Model file is updated and there is the tutorial that I'm using.

Nissan Skyline.skp

Tutorial.skp

Thanks but Toaster's thread doesn't help much and that other one. Doesn't it just make everything rounded? Seems like it would make my car look like a bubble. This car isn't completely rounded.

I am trying to make a Nissan Skyline using a blueprint but I don't know how to round the corners. I traced from the side which probably made more edges to curve.

This is the model that I have so far.

Thanks again. Though I do wish I could model it.

Thank you very much It's my first time using SU so I don't really know how to use it correctly. I just copy and pasted one corner for all four corners and I knew it was ugly but I didn't know how to fix it.

I'm following your instructions but how do I apply as texture? and did you drag and drop the picture into SU?

Also how do I get that little person? It isn't there anymore.

When I apply with the paint tool, it just goes translucent.
I edited that image of the roof so it was just the roof with a transparent background.

EDIT: I tried changing the material dimension and it now looks somewhat like the above.

Yeah I'm thinking of just putting a texture on it instead of modeling the roof.

How do I make an image that would fit perfectly onto the shape? I have photoshop but I don't know how yo get the correct dimensions

Oh, woops. didn't see that. Thanks.

This is what I have without using soap skin.

BC Place Stadium.skp

Yes I see the the tools for soap skin.