I made this Game Symbol Prop out of 1/4" aluminum I got from a local metal and welding supply house.
I got “Scrap” aluminum (left overs form cut up 12’ x 4’ sheets) sold by weight, very cheep.
The photo is of it with just some light sanding with a sanding sponge to clean it up. Later I got a buffing wheel and compound from harbor freight and buffed it to a nice shine. It also softened the edges a bit. But it did not take out all the scratches. I think wet sanding it with some 800 grit then buffing it might do the trick.