GLASS BEADING INSIDE OF VALVE COVERS AND OIL PANS
Anything media blasted for an engine. Intakes, heads, Blocks, must be put into a hot tank, then a wash cabinet, then a rinse booth , Blow dried and put in a engine tumbler and rewashed then blow dried again. Every thread hole must be chased and every baffle removed. This is usually my job in the shop when he lets me. Race engines he does himself . He don't trust anyone when it comes to cleaning internals.
Tumbler Below, Oscillates and vibrates while spinning. Shakes the ground with a Cummins block in it. You would not believe the **** that comes out even after it is media blasted, then Hot tank, Then Wash cabinet, and blow dried.