Wear indicating brush

A removable workpiece for use with a motorized personal appliance, comprising:

• a body having an outer surface;
• a treatment applicator coupled to the outer surface of the body, wherein the treatment applicator is configured to apply treatment to a subject's skin;
• and
• means for providing an indication to a user recommending replacement of the workpiece after an amount of usage of the workpiece, wherein said means for providing an indication includes a member movable to a deployed position in which the member is adjacent an outer end of the treatment applicator.

A powered treatment device, comprising:

• a powered handle having a motor;
• a skin brush head removably mounted to the powered handle and configured to be moved by the motor, wherein the skin brush head includes
• a body having an outer surface;
• a plurality of bristles that extend outwardly from the outer surface of the body, and
• a wear indicator associated with the skin brush head, the wear indicator including a wear indication member configured to move to an indicating position with respect to the plurality of bristles for indicating to a user a recommendation for replacement of the skin brush head after an amount of usage of the skin brush head.