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Simple Sandblaster
A plastic bottle filled with sand is joined to a metal bracket with adhesive tape, and a hose clip holds the other end of the bracket to on air nozzle, as shown. To operate, invert the bottle of sand and squeeze the nozzle's trigger. Using regular construction sand; it took only two bottles of this to restore an old engine case. Caution: mask off all bearing and machined surfaces and wear a safety mask! ILLUSTRATION...
PARDON THE INTERRUPTION
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