I suppose a lot of modern blacksmiths use recycled metal in their work. 
This guy makes a point of it by making knives from urban litter.

https://www.theguardian.com/environment/2022/jan/20/blacksmith-recycles-
canisters-into-cult-kitchen-knives-for-zero-waste-foodies

Don

-- 
Jason Kenney - his mother's worst nightmare. . . . UCP - Unqualified to 
Clean Portapotties