You make a good point regarding additional training Jack. We do have guidelines for acceptance/rejection criteria but they are straight out of the spec. Our customer is taking responsibility if the part warps as long as it is masked and shot peened according to the model(CATIA)which it is. Then they will inspect it on there end and make the decision.
My concern is us stamping the part as acceptable because here isn't anything in the shot peen spec that addresses accept/reject criteria for a slightly warped part.
Thanks again for your valuable response.