Profile: A & H Duffy Polishing & Finishing Co., Inc. is a polishing and finishing company. We cover a wide range of industries, including jewelry, automotive, aviation, writing instruments, hardware and plumbing. We are equipped to provide various blasting operations utilizing both automatic process and hand operations. We also offer a wide range of media choices to produce the desired finishes & textures, which includes sand, glassbead, aluminum oxide and silicon carbide.