Vapor Blasting uses water, micro beads, mild cleaning agents, and air.
These components are mixed into a slurry and propelled at high speed
toward the surface of a metal part, cast iron, aluminum, brass, as well as mild steel.
It seals the surface, resulting in cosmetic enhancement and imparts a micro finish that helps
it resist further staining and oxidation.
Vapor blasting is a wet process. The water cushions the media (glass beads) impact,
provides a liquid honing effect and flushes away all of the contaminates (grease, dirt, oxidation, rust, etc.).
It flows and cleans in areas that dry blasting won't, like inside of carbs, ports
and deep cylinder fins. The finish that vapor blasting provides is like the part was just cast.
The peening - peening! - effect provided actually seals the microscopic pores on the surface,
the part will not absorb grease and dirt like a dry blasted part will. Surfaces are not affected,
precision tolerances, such as bearing fits and piston size will not be changed.
The water component of the slurry provides a hydraulic cushioning effect to soften
the microbeads impact on the metal's surface. Working together, they provide a gentle,
and somewhat time consuming process that peens the metal surface and leaves a bright lustrous satin finish. Finishes will vary from alloy to alloy and manufacturer to manufacturer, but all are good.
Aluminum castings in particular are well suited to this.
Look hard, as there are very few places in the states that offer vapor blasting as a service,
but it's worth the time and money.
Parts before and after be Vapor blasting