Gundam model (nozzle problem)

If there is a pen or sprinkler irrigation, spray a layer of soil with 1000 water first, and then spray the primary color when it is dry. If there is no such tool, use 800 sandpaper to polish it, then use 1000 sandpaper to polish it, then use coarse-grained polishing paste, and then use fine-grained polishing paste. That's good. Although it is troublesome, it must be done well.