Tamiya aluminium spoke wheels 53140?
kalsh

I'm pretty sure mine are genuine (Probably bought them about 30 years ago), and mine don't have a Tamiya mark (Checked 2 wheels).

To me they look genuine, but it seems they have been polished.

I've had mine on a Idemitsu Motion Mugen Civic (58121 FF01) ever since I bought them.
I think it's pretty obvious that I've tried them on several other bodies, but to me they looked best on the Honda body, but that was quite a while ago...
2-Jun-2019

Tamiya 53131
kalsh

Wish I bought these as well back then (Close out sale, bought lots of stuff for peanuts, but I wasn't rich enough to buy it all... still ain't), but to me these didn't look quite as good as the 6 spoke 53140 wheels.

Personally I wouldn't polish them, or maybe I would, but then probably use something like Scotch Brite to make them look like brushed aluminium/aluminum again.

Give me some time and I may be able to give you some tips...
Right now I'm very busy, so it may take a couple of weeks or maybe even longer, but my 53140 wheels look a lot worse.
2-Jun-2019