White deposit on brushes. Home › Forums › Trade Technical & Spare Parts Forums › Trade Technical Enquiries › White deposit on brushes. This topic has 1 reply, 2 voices, and was last updated 14 years ago by leavemetogetonwithit. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts April 5, 2012 at 12:47 pm #68801 leavemetogetonwithitParticipant This is from a Chinese Ceset motor from a “Bendix” BIWsomething or other. There is a very damp wall behind the machine. The tacho coil was o/c but I got one off an old motor. Just wondered what the white deposit is caused by? Mike. April 9, 2012 at 12:22 pm #372812 SeamyParticipant Re: White deposit on brushes. Dampness Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In