What is used to identify repaired areas after blending?

• A. Felt tip dye marking material
• B. Permanent marker
• C. Engraving with a stamp
• D. Painted chalk marks

Answer: (A)

After blending a repaired area, you need a marker that is visible for inspection but can be removed later without harming the surface. Felt-tip dye marking material provides clear, contrast marks on metal that identify the blended region, and it can be wiped away or removed during subsequent cleaning or reinspection. This makes the area traceable without introducing permanent changes. Permanent markers are too lasting and can interfere with inspections or coatings, engraving would alter the surface geometry, and chalk marks can rub off, leaving the repair unidentifiable.