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.
Funnily enough down the line I want to learn some woodworking for my costume - make a legit wood stock for my blaster props.
Have you looked into 3D printing? You could just print a blaster out in pieces.
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.
