Vapor Blasting or Vapor Honing is:
Vapor blasting uses a water borne abrasive, giving the highest quality surface finish on everything from plastics to metals. Gentler and more environmentally friendly than sand blasting, vapor blasting removes paint, rust, scale, carbon and more.Vapor honing allows corroded and painted parts to be brought back to original condition. Vapor blasting services for motorcycle and car restoration, firearm re-coating, coins and more.
Follow this link about the process for more details.