Abstract: A combination of a bonnet and a base member used in connection with a rotary cleaning machine. The combination includes a base member for attachment to a drive shaft of a rotary cleaning machine. A brush member is releasably positioned on the base member. The combination further includes a bonnet constructed of flexible material which includes an opening correspondingly sized and located to receive the brush member therethrough. The bonnet is positioned on the base member such that the brush member extends through the bonnet opening to form a cleaning surface by the combination of the brush member and bonnet. This arrangement allows the brush member and bonnet to be independently replaceable.