IMO it`s an awfully fine line...and maybe just a matter of semantics...between "burnishing" and "Finish Polishing".
If I go from M101 to HD Polish, it`s merely Finish Polishing. But if I do M101, then M205, and *then* HD Polish/[whatever] I bet many would say it`s Burnishing.
MY definition of Burnishing/Jeweling = Polishing beyond the removal of visible imperfections to increase the gloss. M205 leaves my paints (micro)marring-free, but they don`t look as nice as they do when I finish with the HD/1Z. I`m "improving on perfection", so that`s burnishing. But what`s the *REAL* diff between that and just going straight from compound to final polish? No diff at all IMO.
And yeah, I suppose that a(nother) final polishing after the HD with, say...PO85rd..might ramp it up in the eyes of a glossmeter, and maybe in the eyes of some other Detailer, but if I can`t see a diff I`m not gonna bother.
I guess some might say I *do* burnish a few of my vehicles, as I follow the HD Polish with 1Z Pro Metallic Polish or their WaxPolishSoft (both discontinued AFAIK, at least in the US). Those do contain abrasives and they do ramp up the look...BUT since they contain LSP-stuff (synthetic waxes or so they said) I figure it`s more of a LSPing than anything else, and I figure the abrasives primarily help make it easy to buff off.