What is the proper sanding sequence for a plastic bumper area repaired with a flexible bumper repair kit?

What is the proper sanding sequence for a plastic bumper area repaired with a flexible bumper repair kit?

• A. 80 grit, 180 grit, and 280 grit sand paper
• B. 1200 grit, 800 grit, 400 grit
• C. 400 grit, 600 grit, 800 grit
• D. 100 grit, 200 grit, 400 grit

Answer: (A)

Sanding a plastic bumper repair area must go from aggressive shaping to a smooth, paint-ready finish. Start with a coarse grit to remove excess material and establish the repair’s contour. The 80 grit stage quickly levels the patch with the surrounding bumper without clogging the paper. Then use a mid-range grit to feather the edges and blend the repair into the surrounding plastic, which helps eliminate noticeable lines. The 180 grit step achieves a gradual transition so the repair isn’t visible under primer or paint. Finish with a finer grit to create a smooth surface ready for primer, with the 280 grit giving the final texture that promotes even paint adhesion. This progression ensures proper shaping, feathering, and surface quality necessary for a durable, seamless repair.

Sanding a plastic bumper repair area must go from aggressive shaping to a smooth, paint-ready finish. Start with a coarse grit to remove excess material and establish the repair’s contour. The 80 grit stage quickly levels the patch with the surrounding bumper without clogging the paper. Then use a mid-range grit to feather the edges and blend the repair into the surrounding plastic, which helps eliminate noticeable lines. The 180 grit step achieves a gradual transition so the repair isn’t visible under primer or paint. Finish with a finer grit to create a smooth surface ready for primer, with the 280 grit giving the final texture that promotes even paint adhesion. This progression ensures proper shaping, feathering, and surface quality necessary for a durable, seamless repair.