how after restoration of heavily rusted metal objects, they still have so much metal left

Question

I’ve seen a number of videos recently of people restoring very rusted objects, like toys and an anceint historical knife, where the rust seems to have eaten most of the metal. However, after restoration, the object seems good as new and don’t seem to have lost any significant amount of mass even though you’d expect there to be nothing left. How is this even possible?

In: 3

Answer 1

Lots of those restoration videos are faked/artfully edited. Depends on the video. The real art is when people make something intentionally cruddy/mud caked or rusted looking so they can make a fake restoration video.