Aluminum has a low melting point, but it will not fall off even if it is melted, because there is alumina outside aluminum. Alumina is a dense oxide film with a high melting point, which will wrap the molten aluminum. If you want to spend more money, you can also use amorphous surface treatment or spray carbide.

Manual work can be divided into repair with hammer and hand iron and repair with heat. Damaged parts should be identified before repair. This is the same as the method of determining the damaged part of the steel plate. Check whether the damaged part of aluminum alloy plate is elongated by visual inspection and hand feeling. If the inner plate is found deformed or separated from the outer plate, it should be replaced.