How long after using a car touch-up pen can you sand it?

[McMia]

You can sand the area 2 to 3 days after using a car touch-up pen. The method for using a car touch-up pen is: 1. Depending on the width of the scratch, choose the fine or slightly thicker end of the pen to gently apply the paint; 2. Apply repeatedly multiple times until the paint is slightly higher than the original car paint surface; 3. Allow it to dry completely for 2 to 3 days before sanding. Precautions for using a touch-up pen include: 1. Choose the correct color of the touch-up pen, as the color directly affects the final result; 2. Do not unscrew the cap when the pen is horizontal or upside down to avoid paint leakage; 3. Store the touch-up pen in a cool place when not in use for extended periods, as it can dry out and become ineffective.