Ball Burnish
The action of a hardened ball against a softer, flat plate
illustrates the process of burnishing. If the ball is pressed
directly into the plate, stresses develop in both objects around
the area where they contact, this method creates the Ball Burnish e
Blasting
Sandblasting is a process wherein a stream of sand is driven by a
jet of compressed air or by water against a surface. This creates a
powerful abrasive action that can clean and abrade any surface put
under the jet of these abrasive particles.
Tumble / Deburr
Tumble finishing, also known as tumbling or rumbling is a technique
for smoothing and polishing a rough surface on relatively small
parts. In the field of metalworking, a similar process called
barreling, or barrel finishing, works upon the same principles.