I want to know what workbench in catia is best for surfacing for example a car?
Professionals use ICEM Surf (stand alone solution or P3 integrated in V5 R21 or higher).
If you are a "beginner" it is much more easier to make an mix of GSD (Generative Shape Design) and FSS (Free Style Shaper). You will find a great tutorial made by Dickson Sham here http://www.dicksonsham.com/
thanks a lot for answer,u helped me a lot :D