I use turtle wax chrome cleaner or "simichrome" aluminum polish on hubby caps, don't wheel them,as it is too easy to go through the thin chrome to the copper plating underneath.
Put tubes in the front tires and use them till the sidewalls give out.
you can do anything you want to
your tractor, just giving friendly advice.
As far as the engine, the series 1 have a deserved bad reputation of bullet holing the block because of poor splash style lubrication.
It almost cost Kohler a bankruptcy back then.
All that said, the series 2 and magnums fixed the poor design problem, (a lot were under warranty) (Deere suffered as well as others)
with a full pressure, cross drilled crankshaft that competed with the best of them, and they lasted.
There are still some that survived( like yours) that attested to the owner taking good care of them.
If you use it a lot, (not just a show tractor,) you will sometime in the future, replace the engine with either a
bolt in series 2, or better yet, a magnum.
Some prefer to update to OHV engines but that is down the road.
No points deleted for a replacement engine from the "correct police" Ha,LOL.
You will prolly want to replace the hydro filter/oil and check the driveline for wear, after all it is 40+ years old.
Take the tunnel cover off and remove 40 years of accumulated debris from the hydro fins
All in good time as they say.