How to Remove Old Paint?

[JesseRose]

Methods for removing old car paint are as follows: 1. Manual Paint Removal Method: The manual paint removal method is commonly used in painting construction and is the only method for partially removing old paint films. It mainly relies on tools such as scrapers, knives, wire brushes, and sandpaper to remove old paint from the surface of car body components. 2. Mechanical Paint Removal Method: The mechanical paint removal method uses electric or pneumatic tools, such as wire wheels, wire sanders, and dry/wet sandpaper sanders, to replace manual scraping and sanding. This method not only improves work efficiency but also reduces labor intensity, making it a widely used paint removal method in the car body repair industry.

[McEli]

When the old car paint looks too ugly, I usually handle it myself. The most cost-effective method is to slowly sand it with 400-grit sandpaper, but be careful not to damage the primer. If you find it tiring, use a specialized paint remover solution, which can be bought at supermarkets. Remember to wear a mask and gloves, as this stuff has a strong odor. For large areas, an electric sander is recommended—it doubles the efficiency but requires some skill. After cleaning, be sure to apply primer as soon as possible, otherwise the metal panels may rust easily. Last year, when I refurbished my classic car, it took me three days to finish repainting the entire vehicle.

[DeRyder]

The key to removing old paint lies in choosing the right method. Professional repair shops often use sandblasting equipment, which is efficient but requires specific steel panel quality. For DIY enthusiasts, chemical paint strippers paired with plastic scrapers work well—spray and scrape simultaneously for best results. Severely oxidized paint layers may require pre-softening treatment, where a heat gun can assist. Always ensure proper ventilation and fire safety as strippers are flammable. Prepare a waste liquid recovery container since this qualifies as hazardous waste. After removal, wipe the surface with metal treatment solution to prevent rust recurrence.

[DeZachary]

As a frequent visitor to modification shops, I have special techniques for paint removal. Before repainting, the old paint must be thoroughly removed, otherwise the new paint will bubble. For local repairs, wet sanding with 800-grit sandpaper is the safest method. For a full car refurbishment, dry ice blasting is recommended—though expensive, it causes no damage to the body. For motorcycle frames, a wire wheel works best, while a nylon brush head is ideal for car body panels. After treatment, cleaning three times with degreaser is crucial. Once, I skipped this step out of laziness, and three months later, the new paint peeled off in sheets, costing me 4,000 yuan for nothing.