I mentioned this in another thread but about a month ago I found an un-opened can of One Grand Blitz wax that was about 3-4 years old. The top layer "skinned" a little bit so I simply rubbed it off to reveal fresh wax underneath.
On my new car (bought in November) I tried a few different waxes over a clay job and a light cut polish but thought it could look better. So I went the sealant route, using Werkstat Prime Strong and several layers of AJT. Still, it seemed to be missing something, looked a little too bright and 2 dimensional for my taste.
So I poked around the "garage" (aka the car sized storage unit with a driveway that came with the house) and found some Meguiar's DC3. Nice shine, nice feel, but it muted the metallic way too much and made it too dark(it's a charcoal gray paint with mica).
Months later, I stumbled across a shiny new can of Blitz. I didn't want to start over with the Prime and AJT layers so I just washed off the DC3 with commercial car wash detergents, which didn't seem to phase the Werkstat stuff but I could tell the wax was gone.
Put a couple thin coats of Blitz on - great! It added just a little bit of darkness to help reveal contours and didn't mute the mica at all! The stuff is a little harder to apply and remove and doesn't have the slicker feel that newer carnubas do, but man does it look good on this car! It's also tough as hell, but doesn't have any solvents in it, so I wound up sealing a few stray water spots on.
I washed it every week for 3 and noticed no change in the appearance at all, so far so good. Then a neighbor dented the car the day before I was gonna wax it again. Awesome.
The repair shop "waxed" the whole car with something pretty murky, ruining the look I worked so hard to achieve. Also, I wanted to remove any fillers they might have used to hide flaws in their work so I could inspect it (they did good work).
So I filled a bucket with heavy concentration of Dawn and hot water then got to work. The only thing they painted, i.e., didn't have any Werkstat or Blitz on it, was the front fascia. One easy pass with the dish soap took care of that. But the rest of the car was still beading like crazy, so I took another pass. Still beading. Filled up another bucket with an even thicker concentration, and put a fair amount of pressure on the finish. Then did it again. Finally, the Blitz was gone (and likely much of the Werkstat too) so I started over with the acrylics.
Order was restored to the universe. It's very clear, not too bright or too dark, and instead of needing a damp, lightly soaped rag to clean dried bird plop off, I can just swipe it off easily with a dry microfiber.
It's old, it's hard to get, but it's still one of the best, IMO.