How do you scale a profile or a contour? Is there a common tool or method that is used to accurately do this?
Could you go into a little bit more detail on what you are trying to do? I am not sure I understand what you are asking.
If you have the profile or contour physically in front of you, make a template out of cardboard or other stiff paper. Transfer this template to regular paper. Use the enlarge/reduce button of a copier to adjust the scale.
I hope that helps. But if you could make your question more specific, maybe I could help more.