Bumpmapping a claymodell of a car

I study 3danimation in school, thats mean my class learn to build a car in clay in blender today…
I have came to that part its time to make the matrial and texture…
Almost done for me, but one thing is remaining… It dont looks like clay, I want some noise, not totally flat skin on the modell, how can I get it?
Sorry for my crappy english :Z

add some “Stucci” textures. Each with a different “Noise size” Then go back to material buttons and change the texture tab (with a stucci texture selected) to “Map To” and click “Nor” (Nor is bumpmapping) then repeat it for all the stucci textures