BRASS BRUSH SMALL Silver Polishing Brass Brush.
This is a nice soft brass brush that gently polishes the silver-clay after firing. will not scratch, some people brush with soap and water.
You are not scrubbing off the white stuff on your silver, it is just the surface wrinkled up, you are polishing it so it reflects light like a mirror.
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.