Sand it all off ?

You guys are savages .

Best thing to do it cover the existing texture with masking tape where it abuts the damaged portion and tape over the surrounding smooth , adjacent panels  .

Then spread a thin layer of lacquer putty like Tamiya Basic Putty over the damaged area .

Let that cure fully .

You might need to do a couple of thin layers until the cured layer of putty is the same , or slightly thicker than the existing , undamaged texture as it shrinks quite a bit during cure .

Then use round jewelers files or sandpaper rolled into narrow tubes to sand that profile back in .

Easier than it sounds .

Way easier than sanding everything off