Thanks - i will give it a try

Hi -
Please forgive me if this has been asked and I just missed it. I figured out how to draw and the push pull tool in sketchup but it leaves everything as a flat surface.

I want to give the guitar shape that I draw an arch top like les paul style guitars. Guitars are not square or round it has a combination of flat and rounded sides and I want it all to be pulled curved up and not flat to a slight arch.

Any help would be greatly appreciated.
Thank you -
Keith