Can a touch-up pen be used for exposed metal?

[McJuniper]

Exposed metal on a car is a relatively serious situation, and using a touch-up pen is not very suitable. Touch-up pens are suitable for minor damage. You can first perform preventive treatment at home, then go to a regular 4S shop for repair. Concept of touch-up pen: A touch-up pen is a car scratch repair tool. By selecting the appropriate model that matches the original car paint color, you can perform the repair yourself. After applying the touch-up pen to small scratches or areas where the paint has peeled off, it covers and fills in the scratches. Using different touch-up pens: The composition of a touch-up pen is generally the original car paint. Since car models vary, different cars can only use dedicated touch-up pens.