What to Do When the Bumper is Squeezed and the Paint Surface Cracks?

[DelAngelo]

You need to have the car's paint surface treated. 1. Treatment method: The main solution is to perform a repainting treatment. At this level, using a touch-up pen or polishing and waxing may not be sufficient to cover the flaws, and prolonged exposure can easily lead to corrosion and rust. Currently, a more convenient and cost-effective approach is to first apply a touch-up pen to seal the damaged paint surface, preventing further deterioration. 2. Situation analysis: The front bumper is made of plastic. If it's just a simple scratch on the paint surface, we can go to a detailing shop for polishing to remove it. If the area is large and polishing is ineffective, repainting will be necessary. If the area is small and the scratch hasn't affected the primer, we can simply ignore it—it's just a matter of appearance. You can also buy a sticker to cover it up.

[McLucia]

Last time I accidentally backed into the wall and squeezed the bumper, causing several fine cracks in the paint, which was quite upsetting. I went straight to a familiar auto repair shop, and the boss said that since it's a plastic bumper with good flexibility, cracking won't lead to rust. They first sanded the edges of the cracks with sandpaper, then filled the dents with putty. After it dried, they sprayed three layers of paint. The key was to accurately match the car paint color code to avoid color differences. Finally, they baked and polished it, costing 500 yuan to fix—now you can hardly tell unless you look closely. Plastic parts repair better than metal ones. If the cracks are too large, the bumper might need to be removed for treatment, so it's best to fix it early to prevent dust from getting stuck in the gaps.

[AndersonFitz]

My old car's bumper developed radial cracks after being rear-ended, and I've specifically researched repair solutions. If the cracks are as fine as a strand of hair, just buy a touch-up pen and dab it a few times—problem solved for twenty bucks. But for webbed cracks like mine, you must sand off the cracked paint to expose the plastic base, then fill the crack edges with epoxy resin. Note: clean thoroughly first, or the adhesion will be weak. When spraying paint, operate in a dust-free booth; otherwise, dust mixed into the clear coat will create bumps. After repair, it's best to apply a layer of car wax to seal out rainwater, or UV exposure will cause the patched area to fade faster.

[OBrooke]

Bumper crack treatment varies by severity. For hairline cracks, use spray paint: Wet-sand the entire area with 800-grit sandpaper, creating a beveled edge at the crack. After drying, apply primer in thin coats, then spray color paint from 20cm away using even sweeping motions. Deep cracks require professional repair - shops remove the bumper for heat reshaping and fill with specialized plastic welding putty. Never use regular body filler as thermal expansion causes detachment. Avoid car washes for one week post-repair to allow paint curing. Regularly inspect bumper clips during maintenance - loose fasteners can cause stress cracks.