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Ok there is where I got confused

Those are not greaseless, the Formax compounds from Caswells are the greaseless ones

Standard Buffing Compounds - Buffing/Polishing - Caswell Inc

They are...

PS:

SFPM = Surface Feet Per Minute is the operative part of buffing, so by changing the 8 inch wheel to a 4 inch you will accomplish two things, both good :)

1. You will cut your SFPM in half...

Need more info

Black and White ???

Type of wheel