Preserving Patina

Have seen used car guys "slick'em" tires and all with atf like that. lol Looks good for a little while.

My cousin bought an old jeep cherokee off his neighbor one time, it was pretty used up, the neighbor was hauling hay in the back of it.
He cleaned the hay out of it, fixed some minor mechanical issues, wiped it down with ATF and sold it quick for his asking price.
It was black, so it shined up decent.