1. Glue: If some hand-made parts or joints are damaged or broken, you can use transparent glue or super glue to repair them. First, smooth the broken part with sandpaper, then apply glue and press the broken part tightly, and wait for drying.

2. Model glue: If the small hand-made parts are lost, you can use special glue for model repair. Apply glue to the parts to be bonded, then bond the parts together and wait for drying.

3. Clay or epoxy resin: If the hand-made part needs to be reshaped or filled, clay or epoxy resin can be used for repair. Clean the part that needs to be repaired first, then mold the clay or epoxy resin into the required shape, stick it on the handle and wait for it to dry.