1, polish the rust with a grinder, polish it as flat as possible, and remove the rust.

2. Find a clean cardboard or box, add putty and curing agent, and fuse putty and curing agent.

3. Apply the mixture of putty and curing agent to the corroded area and wait for drying. Trucks generally refer to trucks. Trucks, called trucks or trucks, include dump trucks, tractors, off-road and off-road trucks and various vehicles specially manufactured for special needs. Refers to the car mainly used to transport goods, and sometimes refers to the car that can tow other vehicles, which belongs to the category of commercial vehicles.