Some very good points have been made. There is definatly a certian satisfaction to be had from taking a old worn piece of steel and resurrecting it as a knife. You mentioned the spark test. I advise a quench test, also. If it gets glass hard, you've got something worth making a test blade out of, anyway.
Many who forge take pride in alot of stock reduction through forging, so odd and large shapes are not really a problem for them. For someone who is just beginning this craft, a rusty old nickolson file is not a bad place to start, and I dare say anything that will out cut it by much can't be heat-treated with a torch, a magnet and a toaster oven....
Frontier damascus....yes, I like that term. My favorite has to be the blade Tai made from, in part, beer bottle caps. That, my friend, is something you don't see every day....
Test every batch of steel you get, regardless of where it comes from. They do all look alike, ya know.
Many who forge take pride in alot of stock reduction through forging, so odd and large shapes are not really a problem for them. For someone who is just beginning this craft, a rusty old nickolson file is not a bad place to start, and I dare say anything that will out cut it by much can't be heat-treated with a torch, a magnet and a toaster oven....

Frontier damascus....yes, I like that term. My favorite has to be the blade Tai made from, in part, beer bottle caps. That, my friend, is something you don't see every day....

Test every batch of steel you get, regardless of where it comes from. They do all look alike, ya know.