I've put my old Dolch SA keycap set on my PC66 which I also outfitted with box whites (alphanumeric) silent box pinks, (navigation keys) super speed reds (modifiers) and a few NK box creams (Space, Tab, Return, Backspace) It's probably the nicest (as in - most comfortable to use) keyboard I ever had. The spacebar could be a bit heavier, and I might replace the spring there.
It's also the first keyboard I had where SA keycaps don't look absolutely ridiculous height-wise. These got unevenly shiny with that "greasy" feeling, because I had used them for a few months and they're ABS. The PBT keycaps that came with the keyboard started to shine up too though. (I type a lot and there's not a keycap in the world I can't get shiny)
I then decided to do the most autistic and insane and polish all of the SA keycaps to what is basically a mirror finish, like old IBM typewriter bakelite keycaps. I first took the lazy way of plastic polish and a cotton buff on a dremel but noticed a few keys in that it leads to a "cloudy" shine; They were shiny but it just didn't look that good, even though they had a minimum of structure, it was still visible and just looked kinda weird, like the keycap was ever so slightly dirty. I then sanded all of them down with progressively finer sanding paper (from 1200 up to 3000 grit) before polishing them to get rid of the structure. (everything less would leave visible scratches at the polishing stage (EDIT: In case somebody wants to repeat these steps, you need to wet sand them under running- or in a bowl of water, otherwise you'll ruin the plastic, I felt like I should probably mention that) The end result was glass-looking keycaps where the doubleshot letters look perfectly merged with the rest of the keycap, like they're one piece. (EDIT: if you have some small scratches at this stage, it might be worth it to polish it with an extra "acrylic scratch removal" compound instead of just polishing it with plastic polisher, as that might take forever, especially if you do it by hand) It looks really nice and funnily, they're not sticky feeling at all, more like the screen of a smartphone, just a bit more silky and warm, if that makes sense. What an absolutely insane amount of work though. I first wanted to "practice" on this set before buying a nicer one but I can't imagine ever doing all that again. Upside is, this set should last forever now. They really should just sell these ABS keycaps with a mirror finish.