Take a look at this picture and tell me if the lines in the rotors are normal. Image Unavailable, Please Login
Sorry, but the pic can't be made large enough to see the lines clearly. However, they radiate perfectly straight and there are four, evenly spaced around the rotor.
Look pretty normal to me, Is the surface smooth, free of any spider lines (little cracks) etc, and what is the lip like on the edge ? If the surface is reasonably smooth, and they do not show massive signs of wear, ie big lip on th edge, then don't worry.