How to fix unevenness after using a touch-up pen?

[Mildred]

Soak 2000/3000 grit sandpaper in soapy water for 20-30 minutes to soften it. After the touch-up paint has dried, perform wet sanding. Use the pre-soaked sandpaper to sand the touched-up area in the same direction until it is level with the original car paint surface. If the car paint surface remains uneven after sanding, you can sand it again. Apply polishing wax to a dry cloth and rub it onto the touched-up area in a clockwise direction. After drying for one minute, wipe it clean.