Will the paint repaired with touch-up paste peel off?

[VanEmma]

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.

[LeonardoLynn]

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.

[DeDawson]

As a DIY car owner, I find it quite common for touch-up paint to peel off. Exposure to wind and sun has a significant impact, especially when parked outdoors under direct sunlight—high temperatures can soften the paint, making it prone to flaking. If you touch or wash the car before the paint fully dries, it can wash right off. Preventive measures for average owners include choosing high-quality touch-up paint, thoroughly cleaning and drying the surface to remove dust and grease before application, and letting it cure for a full day without disturbance. From my experience, careful application can last a few months, while sloppy work may peel within days. It's best suited as a quick fix for minor scratches—don’t expect long-term durability.

[EllaFitz]

I've used touch-up paint paste a few times, and it does tend to peel off, especially if not applied properly. For example, if the surface has wax or dirt that hasn't been cleaned before application, the adhesion will be poor and it's more likely to come off. Also, if the amount applied isn't controlled well—being either too thick or too thin—it can affect drying and durability. I recommend cleaning the scratch and lightly sanding it to increase adhesion before applying a thin layer and waiting for it to dry. Although it's a quick fix, it's not as durable as professional spray painting. There's a higher risk of it coming off when exposed to water or scrubbing. It's okay for small areas as a temporary solution, but for larger damage, it's better to get it professionally repaired.