Well, my current hobby is working on a set of custom Mandalorian armour.
Now, not only does this include things like sewing, leather working, and in some cases metalworking, as well as painting, it also includes, and is almost, from a time perspective dominated by sanding.
If you ever end up looking into costuming and prop making as a hobby, what you’re really picking up is a sanding hobby.
Did you provide Apple with the receipt you got from Amazon when you purchased them? Or did the original owner provide you a copy of the receipt when they purchased them?
Because before Apple will remove activation lock they would want to see a copy of the second.
Apple doesn’t give a shit about the receipt that shows you purchased second-hand, they only care about the receipt that matches their records of where the device was originally sold.
To add to this and clarify:
While there are ways to remove activation lock, it is either with the method you posted, or by providing Apple with a copy/scan/etc of the original (i.e., the one that matches Apple’s records) purchase receipt, that must also clearly show the device’s serial number.
Most of my current run of hard costume parts and props are 3D printed. You still need to fill the print lines and sand to get a good looking prop.
Additionally my eventual goal is to have zero 3D printed parts because I want it to be “better than screen accurate”, to have the costume really be made out of metal and wood and the like.