How many times as a pilot AC owner were we told about dangers of nicks and scratches on our props and what could happen? Every annual my prop came back smooth and clean with all the nicks and dings cleaned up. Supposedly such cleanups were to be done by a prop specialist but the shops deemed removal of such flaws of very high importance, and someone in the shop did the job because they all knew not doing it was potentially dangerous or at least very expensive down the road. Be interesting to know how much a Herky bird prop blade costs.