How to Deal with Long Scratches on Car Paint?

[SanLogan]

Methods for dealing with long scratches on car paint: 1. Hairline scratches, which can usually be removed by polishing or gently wiping with a polishing compound; 2. Light scratches, for which you only need a tube of toothpaste. Toothpaste is very effective for shallow scratches that have not damaged the car's primer; 3. Moderate to deep scratches, which cannot be repaired by polishing. If the dent area is small and does not exceed 5mm, it can be leveled with filler putty before repainting; 4. Deep scratches, for which severe deformation requires bodywork. The treatment of scratches places relatively high demands on the technician's skills.

[StLydia]

Ah, seeing long scratches on your car is indeed frustrating. I've dealt with it several times myself. First, assess the depth – run your fingernail across the scratch. If it catches, it means the primer is damaged, and you'll need to visit a professional paint shop. For shallow scratches, it's much simpler – buy some scratch wax online and use a polishing pad to buff the area in circular motions. This can usually cover 80-90% of the scratch. Remember to wash and dry the car before polishing to avoid sand particles damaging the paint. Last week, I had a half-meter-long mark on my door from a tree branch, and this method saved me over 600 yuan in paint costs. However, note that pearl white or metallic paints may show color differences after repair.

[AnastasiaFitz]

Speaking of long scratches on car paint, my neighbor who works in auto body repair taught me a folk remedy: For deep scratches, apply clear nail polish first to prevent rust (transparent color works), then take it to a repair shop. Don't underestimate this temporary fix—last year when my car's hood got keyed, this trick helped me hold out until weekend repairs, preventing rainwater from corroding the metal. During professional repairs, the technician will apply putty to fill dents, use specialized equipment to mix and match paint colors, and finally bake it in a paint booth. The whole process takes about 2-3 hours, priced by panel—for example, a door counts as one panel, mid-range cost around 400-500 RMB. Avoid washing the car for three days after repair, as the new paint surface is still soft and prone to water marks.

[VanLily]

Dealing with long scratches depends on your budget and the car's condition. For older cars, using a touch-up paint pen is the most economical option—though visible up close, it won't be noticeable from a distance. For a more refined approach, spot painting is recommended: only sanding the scratched area saves time and money while preserving the factory paint. A handy trick learned from Douyin: toothpaste combined with static cling film can temporarily cover fine scratches, as the abrasives in toothpaste fill the gaps. A word of caution: avoid DIY spray cans sold online for touch-ups. I tried them once, and the color mismatch and paint runs ended up costing extra for rework.

[JanelleAnn]

Long scratches require layered repair! Surface clear coat scratches can be removed with polishing compound; damage to the color coat requires touch-up; deepest scratches reaching the electrocoat layer must be addressed immediately to prevent rust penetration. The 30cm scratch on my car was fixed at a dent repair shop - the technician used a special hook to pop out the dent before repainting, costing 380. Scratches on plastic bumpers are actually simpler - just order a touch-up kit matching your paint code online (includes sandpaper, filler and small paint can) and follow tutorial videos to fix it in an hour. But remember to remove rust from metal parts before repainting, otherwise the touch-up won't last.

[SanKennedy]

Scratches longer than a credit card require attention. Remember three points for DIY repair: For horizontal long scratches, don't rub along the length—sand vertically to avoid deepening; avoid working under high temperatures in summer, as solvents evaporate too quickly and leave patches; for dark-colored cars, a full wax after touch-up helps color transition appear natural. That scratch running from my side mirror to the rear was treated with 'spot spraying' technique recommended by a friend—using a toothpick to precisely dab paint, then curing with a heat lamp. The result was far superior to full-panel respraying, preserving 90% of the factory paint. After repair, park in a shaded garage for three days to enhance new paint durability.