my son started on the road to becoming a marine,stated the plege at the fed building in okc yesterday he is in cal today,anyway i told him i would give him a pistol of his choice upon competion ,he wants my old p89 he loves it and has shot thousads of rounds out of it,so i was thinking of parkerising and a new spring and firing pin,can a person engrave on a parkerised gun ?if not sugestions are welcome . thanks