2. Insert the glue gun into the power socket and preheat it for 3-5 minutes to let the hot melt adhesive melt completely.
3. Select the appropriate traction gasket according to the diameter of the dent, pull the trigger of the glue gun, and cover the traction gasket with melted glue.
4. Align the traction washer coated with hot melt adhesive with the center of the depression, and gently press it by hand.
After 5.3-5 minutes, align the center hole of the tension bridge with the shaft of the traction washer and fix it.
6. Screw the knob onto the screw shaft of the traction washer and tighten it slowly until the concave part is repaired.
7. If the dent is not repaired, you can repeat the above steps until the dent is repaired.
8. If the diameter of the depression is relatively large, it can be repaired from the periphery of the depression, and the repair steps can be repeated clockwise until the center of the depression is repaired.