There are burn marks on the surface of aluminum products produced by die casting mold, and the font on the surface is blurred. How to repair the mold?

This is too easy to solve. You can buy some paint for painting the wall, dilute it and spray it on the mold. The thickness is about half a millimeter. As for the illegible handwriting, you can see if the font is glued with aluminum. If the strain does not affect the product size, it can be polished with a pneumatic grinding head. When I was painting, it must be a hot mold. Don't spray when it's cold.