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There are some scars on the nozzle of Gundam model after being treated with sandpaper. How to remove it? And how to polish it effectively?

Two methods:

1. Continue to use high-grade sandpaper until it no longer works, and then apply the scrub to a soft cloth to polish the scar. If possible, you can use toothpaste. This requires a lot of patience.

2. Use sandpaper to polish it until it is smooth, then fill it with water and spray paint, but it is not recommended for novices.