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Oxides, paint or other solid
contaminants can be removed by impinging all or selected areas of a part
with an abrasive material. The abrasive, which is a powder of aluminum
oxide, steel shot, glass beads or other sand-like material, is sprayed at
the part using pressurized air through a directed spray nozzle. This
process is used to prepare parts for further machining, coating or
painting, and is also used as a final step in the manufacturing process to
improve the surface appearance of the parts. The surface texture varies
from a matte gray to shiny, determined
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