For what it's worth, and despite some contrary advice I've read here, I went ahead and did the floor polish thing over the weekend.
The grey glass finish was just looking horrible, with oxidation.
I had hit it hard last year with various rubbing compounds and oxidation removers, and waxed it up.... but it never did look great after a lot of work.
So I scrubbed it down really well and thoroughly with barkeeper's friend, to "even out the dull"
then used several coats of the floor polish
Zep wasn't handy so i ended up using
Quick Shine by Holloway House
https://www.hollowayhouse.net/?gclid=CjwKEAjw5vu8BRC8rIGNrqbPuSESJADG8RV0EKn-30BJq4vWS_02Rd_vaMWTl3U146tAUalNd7XpuBoCIXXw_wcB
It smells and looks just like the future acrylic floor polish mom always used on her floors. Brought back memories.
WOW! after a few coats it really looked great!
I was considering going over it with a good coat of a good wax at a protectant, but ran out of time. Oh well, I figure i'll let it cure a few weeks to see what happens, and maybe go back and give it another coat followed by wax if things are looking good.
Floor polish may not be intended for the purpose, but the way I loo at it, it's sorta like a poor man's clear coat. I'm looking at is as a sealer. Something to seal the fade to smooth the surface and bring out the shine....not so much perhaps as a protectant