(P) Porcelain – This is a porcelain media that has no abrasive in it. It is used to burnish (pre-polish) all materials. It can be used as a second step or used alone when only a burnish is required.
iv been fighting this for 3 years trying to get a suitable machine finish on our aluminum parts, finally we got a working program and the parts are excellent beyond all expectations. they compare to hand polish . thanks guys