Will the paint repaired with touch-up paste peel off?
2 Answers
It will not peel off in the short term, but it's hard to judge beyond five years. It mainly depends on how the repair is done. If there is no sanding or any treatment—just a simple dab—it will peel off eventually. However, if the process includes sanding, spraying, and applying clear coat, it should last for five years without issues. Below are explanations on timely car washing after rain and scratch treatment: Timely car washing after rain: Rainwater contains many acidic substances and dust. After rain, the water stains on the car body gradually shrink, increasing the concentration of acidic substances in the rainwater. Combined with the dust in the rain, these stains can damage the car's paint over time if not rinsed off with clean water promptly. Scratch treatment: Minor scratches, whitened marks, or hairline scratches on the paint surface during vehicle use generally do not require touch-up paint. Light scratches can be treated with car wax, while slightly deeper ones may need polishing. If the scratch is severe enough to reveal the primer layer underneath, further action may be necessary.
I used touch-up paint paste to fix minor scratches when repairing my car before. Honestly, it was quite convenient, but it does peel off, especially if the surface isn’t cleaned properly or sanded well. Extreme weather changes also cause issues—summer heat bakes it, winter cold freezes it, and the paint layer expands and contracts, leading to peeling and flaking. At the time, I rushed the job and didn’t fully remove dust, so after a few rain washes, a big chunk came off. A truly professional paint job involves sanding, cleaning, applying primer, and finally spraying color paint. Touch-up paste is just a temporary patch with poor adhesion. For longer-lasting results, you need to follow the instructions step by step—sanding smooth before applying—but the effect still can’t match professional repair shop treatment.
