A coating apparatus having a base for carrying loose material; the base being rotatable to coat the loose material; the coating apparatus having a cleaning arrangement; the cleaning arrangement including a base-scraping arrangement ; and a mounting arrangement by which the base-scraping arrangement is mounted to be reversibly lowered, from a coating position, to a scraping position at which the base-scraping arrangement is positioned to scrape buildup from the base , the base-scraping arrangement being shaped for buildup scraped from the base to be driven, by rotation of the base , outwardly along the base-scraping arrangement to clear the base of the buildup scraped from the base and wherein the base scraping arrangement is a non-rotating portion including a base-scraping member and the mounting arrangement , characterised in that the base includes a conical outer wall for surrounding the loose material; and the base-scraping arrangement includes a portion for scraping the conical outer wall and inclined rearwardly relative to the rotation of the base , and in that the mounting arrangement includes a suspending member and an actuated pivotal connection by which the base-scraping member is mounted to be pivotally lowered from coating position to a base-scraping position. the base being rotatable to coat the loose material; the coating apparatus having a cleaning arrangement; the cleaning arrangement including a base-scraping arrangement ; and a mounting arrangement by which the base-scraping arrangement is mounted to be reversibly lowered, from a coating position, to a scraping position at which the base-scraping arrangement is positioned to scrape buildup from the base , the base-scraping arrangement being shaped for buildup scraped from the base to be driven, by rotation of the base , outwardly along the base-scraping arrangement to clear the base of the buildup scraped from the base and wherein the base scraping arrangement is a non-rotating portion including a base-scraping member and the mounting arrangement , characterised in that the base includes a conical outer wall for surrounding the loose material; and the base-scraping arrangement includes a portion for scraping the conical outer wall and inclined rearwardly relative to the rotation of the base , and in that the mounting arrangement includes a suspending member and an actuated pivotal connection by which the base-scraping member is mounted to be pivotally lowered from coating position to a base-scraping position. a base-scraping arrangement ; and a mounting arrangement by which the base-scraping arrangement is mounted to be reversibly lowered, from a coating position, to a scraping position at which the base-scraping arrangement is positioned to scrape buildup from the base , the base-scraping arrangement being shaped for buildup scraped from the base to be driven, by rotation of the base , outwardly along the base-scraping arrangement to clear the base of the buildup scraped from the base and wherein the base scraping arrangement is a non-rotating portion including a base-scraping member and the mounting arrangement , characterised in that the base includes a conical outer wall for surrounding the loose material; and the base-scraping arrangement includes a portion for scraping the conical outer wall and inclined rearwardly relative to the rotation of the base , and in that the mounting arrangement includes a suspending member and an actuated pivotal connection by which the base-scraping member is mounted to be pivotally lowered from coating position to a base-scraping position. <EOS>