Hey I found this I think you might really like it as a practice piece
Limited-time deal: Kershaw Cinder-Copper 1.4 In. Blade; Small Pocket Knife with Stonewash Blade, Copper Handle, Manual Open, with Thumb Stud, Bottle Opener, Liner Lock and Lanyard Hole (1025CUX) https://www.amazon.com/dp/B07NQTGWRB/ref=cm_sw_r_cp_api_i_dl_RCXNC6TXS1WCVW47QKRG?_encoding=UTF8&psc=1
This would patina cool as fuck
I mean, I can. But for another $3, you could have it in 2 days from Amazon https://www.amazon.com/Kershaw-1025CUX-Cinder-Copper/dp/B07NQTGWRB. Up to you though, just putting that out there.
LMK!