M16 Professional Paste Wax is very much an old-school hard paste wax. it`s sale (and I believe production) in the USA was stopped by EPA VOC (volatile organic compounds) non-compliance regulations (Thanks to Senator/VP Al Gore`s environmental legislation) in about 2005.
It does provide an very "nice" glowing carnauba shine for the early 2000`s price of about $12.00 per a tin. I like it for single stage paints, but alas, my remaining tin is almost gone. A tin (11 oz/312 gm) will do at least 20 cars, even for a novice who applies it like putty, and if you are more "judicious" in it application, I am sure you could get 30 cars out of. It comes off pretty easy as long as you do not wait forever to let it dry or apply it the sun (a big no-no). It has a distinct odor, which everyone who has used it describes it as a light blue Crayola crayon. Longevity is about 2-3 months, depending on environmental conditions where the vehicle is. Yes, it does have that characteristic carnauba water beading, although not as "tight" as Collinite 467S.
Is it worth having today or adding it to one`s collection for about $30 a tin IF you can get someone to part with it?? I like Collinite 915 if I am going to wax a vehicle; lasts longer and has that characteristic tight water beading that EVERYONE thinks means your paint is protected (don`t even go there!;, that`s another thread topic that has been discussed ad nauseam in this forum) If a person has a collector`s 70`s or 80`s vehicle with single stage paint and I wanted an era-correct look to it for a car show, then yes, I would definitely have some M16 in my arsenal.
One other application for M16 was lacquer finishes on guitars. Do not laugh!. It made any guitar, electric or acoustic, painted or cleared with lacquer shine like the sun. It`s great for that application alone to have in your wax stash! (Come to think of it, that`s how Jescar got started, They reformulate Menzerna polishes for use on guitar finishes)