Hi Sildeman,
Have a look at some of the car modelling basics among these tutorials:
http://www.sketchucation.com/intermediate-tutorial-index/
Indeed, such "organic" shapes are not easy in SU but with some prectice, you can get ever better.
Also, here is a tutorial about placing 3D text on a curved surface - you will get the basic idea and from there on, can do it on any kind of surface:
http://www.sketchucation.com/creating-3d-text-on-a-cylinder-in-google-sketchup/