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Welcome to Mapsco Finishing.com

Mapsco (Magnetic and Penetrant Services Co., Inc.) is a finishing services company located in Seattle Washington. Mapsco has been serving our customers in the aerospace and commercial industries since 1981.
  • Some Of Our Processes Include:

  • Anodizing
  • Chem-Treating (Alodine Colored & Clear)
  • Shot Peening
  • Titanium Etching
  • Phosphate Flouride Coating
  • Passivation of Stainless Steels 
  • Application of Primers & Topcoat
  • Application of Dry Film Lubricants
  • Magnetic Particle Inspection
  • Sol-Gel of Titanium & Stainless Steels
  • Liquid Penetrant Inspection
  • Vapor Degreasing
  • Emulsion Cleaning 

To see all of Mapsco's Boeing approvals click on this link: Boeing Approvals  Please keep in mind that only the major processes that require approval are listed on Boeing's D1-4426 website. Many minor supporting processes do not require approval and are not listed.

Mapsco maintains various other approvals besides Boeing such as Bell Helicopter, BF Goodrich, NADCAP, and many more. Please call our Sales/Quality team @ 1-206-762-5855 if you need further info.

Magnetic & Penetrant Services Co., Inc

8135 1st Ave South Seattle, WA 98108

PH:206-762-5855   Fax: 206-763-1641
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