Manual treatment, mainly using grinding paper, blades and other tools to remove surface rust, this kind of manual treatment for a small part of the rust is better, large area is time-consuming and laborious;
How to Avoid Rust of Electric Suspension Door in Trackless Suspension Door
Chemical treatment is the use of some chemicals and rust on the suspension door to react, and then rust removal, commonly known as "pickling". This method can not ensure other reactions after pickling, so few people use it.
Mechanical jet treatment, which uses some special mechanical wind brushes or electric brushes to eliminate rust marks by friction impact, is used by the majority of "trackless suspension door" manufacturers.