Progression depends on reliable judgement and control, not simply job volume.

Readiness checks

  • Consistent identification of common materials.
  • Independent testing and process records.
  • Understanding of the relationship between finishes, colour and adhesion.
  • Prompt stopping when abnormal changes occur.

Training sequence

  1. Verify foundational skills with standard cases.
  2. Add focused exercises that change one variable.
  3. Move into actual repairs under an instructor's supervision.
  4. Extend independent work only after durability and handover checks are satisfactory.

Dramatic before-and-after images can distract from grain, feel and lasting stability. Advanced work requires clearer limits as well as broader skills.