Use this illustrated first frame, locked overhead camera. The single broad brush remains in contact with the panel and makes one slow straight stroke toward frame right. Dust dots disappear only in the narrow band directly passed by the bristles, extending the existing clean patch behind the brush. Keep dust outside that band and ahead of the brush unchanged. The cleared track remains visible after the brush has passed. Keep the frame fixed, with no new brush, liquid, global wipe or scene transition. Stop the brush before the panel's right edge and hold.
