Which material is used to restore smooth contours after metal repair?

Which material is used to restore smooth contours after metal repair?

• A. Body filler
• B. Primer
• C. Undercarriage coating
• D. Sealant

Answer: (A)

Restoring smooth contours after metal repair involves filling in irregularities and leveling the surface so it sits flush with the surrounding panel. A body filler is the material used for this step; it’s a polyester-based compound that’s spread over the repaired area, shaped to match the intended contour, and then sanded smooth. This creates a uniform surface for primer and paint to adhere to. Primer is applied after smoothing to seal and improve adhesion, not to shape the surface. Undercarriage coating protects the underside, and sealant seals seams, but neither is used to smooth exterior panel contours.

Restoring smooth contours after metal repair involves filling in irregularities and leveling the surface so it sits flush with the surrounding panel. A body filler is the material used for this step; it’s a polyester-based compound that’s spread over the repaired area, shaped to match the intended contour, and then sanded smooth. This creates a uniform surface for primer and paint to adhere to. Primer is applied after smoothing to seal and improve adhesion, not to shape the surface. Undercarriage coating protects the underside, and sealant seals seams, but neither is used to smooth exterior panel contours.