The aluminum skin in the freezer is a spare part often used in the freezer, and it often has dents, scratches, tears and other injuries. In this case, we can use the following methods to repair.

1. Scraping the concave part: Step 1, scrape the outside of the concave part inside the aluminum sheet. Sandpaper or wire brush can be used to scrape to the outside of the concave part to make it smooth.

2. Rust removal: If rust has appeared on the surface of aluminum skin, it is necessary to use sandpaper to remove rust, sundries and other substances on the surface of aluminum skin and ensure that the surface is clean before subsequent operations.

3. Planing the concave part: Next, it is necessary to gently tap the inside of the concave part with a rubber hammer to make the surface of the aluminum sheet form a flat surface.

4. Local heating: If the aluminum skin is uneven and the concave shape is difficult to repair, tools such as baking gun and blowtorch can be used to heat this part. Heating can soften the surface of aluminum skin, so that we can use pliers and other tools to reset these uneven parts and make them shape.

5. Overall polishing: Use tungsten steel lamp holder knife or sandpaper to polish the surface of aluminum skin to remove all glaring scratches or dents. Finally, other grinders and molding tools are used to polish and paint the aluminum surface.

In short, the repair of aluminum skin requires special skills and methods, not only careful observation, but also special patience and care in operation. If the operation technology is not skilled, I suggest you find a professional or experienced person to operate, so as not to cause greater losses.