Swap meet material.
They could stand planishing and buffing. My intention is to sell the Superbeetle as is and put these Marathon/Jubilee OEM wheels on my last remaining Beetle.
Maybe they will wind up on those. I wouldn't want to drill holes in them. My son buys magnets for gaming miniatures in bulk.
https://duckduckgo.com/?q=magnets+for+gaming+miniatures