Hi I have strung a Duora Z-Strike with 10,5/11kg and believe that I have damaged the coating in the middle of a paint chip. It's just an optical thing, but how do you mount the racket on a paint chip? I use the Superstringer S90 and had exactly one frame-support on the paint chip. Would it be better to set the frame-support higher or lower? With the S90 you only have a small area and then the support would not be at the optimal point.
If it's just a paint chip and the racket isn't damaged I wouldn't bother with it too much, I think it's more important to have your supports in the right place.