Mr Hobby (Gunze) GT105 Mr Melamine Foam Sheet for Flat Finish

This thin melamine sponge can be used to polish the surface of plastic model parts, allowing you to easily enjoy a natural matte finish that makes the most of the molded color.

By compressing the foamed material in a special way, it is about four times more durable than regular melamine sponges. It is
durable and long-lasting, and does not easily fall apart.

Two types are released at the same time: a sheet type that can be used like sponge sandpaper or waterproof paper, and a split type that comes with a handle stick for application.

Simply add water and polish to soften the gloss of the plastic surface, and you can easily achieve a heavy-duty matte finish without using a matte spray. You can cut it to your desired size with scissors or similar.