Founded in 1991, River Street Metal Finishing, Inc. is a Massachusetts-based precision metal-finishing company specializing in high-quality surface treatments for aluminum and stainless-steel components. Located in Braintree, Massachusetts, the company serves manufacturers throughout New England and supports demanding applications requiring multiple finishes, intricate masking, tight tolerances, and consistent process control. Its core capabilities include sulfuric acid anodizing, dyed anodizing, hardcoat anodizing, chromate conversion coating, and stainless-steel passivation. River Street also provides specialized finishing in accordance with military, aerospace, and industry specifications, including applicable MIL, AMS, and ASTM standards. The company maintains a NADCAP-accredited quality management system and performs inspection and documentation throughout the production process, from incoming material through final packaging. With an emphasis on precision, quality, traceability, and on-time delivery, River Street Metal Finishing provides dependable finishing solutions for manufacturers requiring durable, corrosion-resistant, wear-resistant, and specification-compliant surface treatments.