There are a range of materials available each give a different finish
WFC - Very hard. Fast cutting polishing mop. Good for making rigid abrasive scurfs.
G - Medium, general purpose finishing mop with finishing compounds. Good for rougeing where little cut is required.
WDR - Soft. A raised one-sided lint finish mop, excellent for silver rouge finishing. Brush free finish if used at correct peripheral speed.
REFLEX - Soft Swansdown. An all round finishing mop for all metals. A must for precious metals.