I doubt it would be spin-stabilized. I think tumbling would be more likely.
It looks like it has a decent amount of cross-sectional area for its mass. If it is steel, it could withstand pretty high temperatures without melting.
"However, sky watching veteran and reentry tracker, Jonathan McDowell who works at the Harvard–Smithsonian Center for Astrophysics, told Inside Outer Space that there is "no obvious space candidate. I am not convinced it's not from an airplane. Don’t see obvious evidence of reentry heating.""
Well, my skepticism about the Kenya space debris may have been wrong. I reviewed the data again, concluding that Space Force estimates of the Ariane V184 upper stage reentry are unreliable; an assocation with this object can’t be ruled out.
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