Most Daggers use Bosch model R5013 5" sponge applicator pads currently available at toolsforless.com for $11.80/each. They attach to most 5inch Random orbital polishers via a hook and eye (Velcro) pad on the back. The front is a rigid polyfoam pad. For fine polishing, I cover the pad with velvet by sewing it to the pad with heavy thread. Some use this system for preliminary wet polishing of Dag plates with fine alumina powder. I prefer to use a high speed jeweler’s wheel polisher to remove the deeper scratches. I follow this up with a Random Orbital polish with rouge, and then lampblack, and finally a buff with a clean pad to remove all polishing powders.
When the velvet gets too dirty cut it off the pad and throw it out.
Velvet is not water washable and you’ll never the grit out.
A good source of silk velvet is http://www.thaisilks.com. They sell 54 inch wide bolts of natural white, 18% silk/ 82% rayon velvet for $17.90/ yard which works well. Alternately they also have 100% silk velvet, 54 inches wide for $36/yard.