Rusty metal is a great material for forging. The rust is an oxide that protects the metal, creating a surface with a lot of porosity and pores
You can create these pores by hammering the metal or by heating the metal to its melting point
If you can't find any rusty metal, you can use any rusty metal that you find in your yard or near your home
Be careful when you're forging, because if you make a mistake it's easy to burn yourself trying to remove the piece from your forge.
can you forge rusty metal