I high pressure glass bead blasted this water pump. Was quick and easy
and came out very clean indeed.

I boiled the water pump and filtered the water afterwards
though a paper towel. As per Archies suggestion. Using a 10 power 
jewelers loop I could see no glass beads in the paper towel 
or on the bare aluminum pump.

I do notice that they seem to stick in nooks and crannies
but I think they can be blown out with high pressure air.

Perhaps a three step cleaning process is called for.
First glass bead blasting to get the crude off quickly
and cleanly and then a thorough blasting with high pressure
air and then a cleaning with solvent or boiling water.

I have not tried Dave Leonards lacquer thinner technique from scratch yet.
I will do that and compare it to glass bead blasting.

Paul Lamar
 
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