That's a really gorgeous car you have.
Like Vegas 911, I probably haven't used Liquid Glass in 20 years or more, but do remember not being very impressed with it at the time.
Would usually chuckle when I'd see it on autozone's shelves in more recent times, and would think "nope, I'm not buying you again".
I have used both Menzerna Powerlock, and WGDGPS 3.0. Just recently gotten the Powerlock, and did a coat just a few days ago on the Kia Spectra Beater I have.
Both are usually spoken of in the same sentence here, and while both are totally exceptional products and have similarities, I think there are some minor differences in look, and feel.
Both produce a very high dripping wet candy like look yet with great depth and clarity to the finish. Both go on looking great, and look even better after some cure time.
Usually the WG products have a nice smell, whereas Powerlock has a strong solvent like chemical smell. WGDGPS is light yellow in color, and Powerlock leans towards a more light lime greenish cast, almost like a lime pudding-yogurt.
Both are super easy to apply-remove. And both go very far in regards to spreadability.
After I applied Powerlock, an hour later a cold front came through with high winds and mucho dust. The Powerlock seemed more prone to attracting dust IMO, but that could've been due to other factors such as relative humidity, and what type of dusts. (here we can get two types of dusts, the ruddy brown soil, and sometimes white, which is Gypsum since I live about 4 miles east of the largest Gypsum Dune Field on earth, White Sands National Monument, and Missle Range)
I have no test data to back that claim that powerlock attracts more dust, I'm not much of a testing type guy.
I give the nod to Powerlock as feeling ever so slightly slicker in feel, but both are truly knock your socks off wow products and worth the money IMO.
I think I overdid it, and bought a qt of powerlock, and that is a whole lot of product! A pint should last quite a while, unless you do many cars.
I've never used Klasse to comment. I've used some of the Duragloss products and these seemed thin-sterile in appearance compared to either WG or Menzerna PL. Mark