I just picked up a XD40 4" at the gun show. The slide is not rusting but does have some scratches. I live in detroit so M&R arms diamond coat is cheap and easy for me no shipping etc. My question is has anybody had them do their gun. I am somewhat concerned with the fact they said they would have to "deburr" the gun. They said all the sharp edges would be smoothed so the coating has more surface area I agree won't chip. I was just wondering how it looked when they did this and how the gun felt function ie racking the slide etc. They gave me what sounds like a good price $110 complete every metal piece in the gun including the pins and springs barrel slide everything. Any pictures or opnions will be appreciated.