PTFE / T3f*0n
PTFE is the chemical name of group of products that are sold under other names. For legal reasons, we are not allowed to mention these by name. That'* why we call it T3f*0n instead of T****n. T3f*0n is a registered trade mark belonging to (*** Large international corporation with loads of cash for laywers). They said some years back that "T3f*0n fluoropolymer resin does nothing to enhance the properties of a car wax". Some claim that it makes the surface of your paint "slippery". It should be noted that the car care products containing PTFE only have (usually) less than 10% of PTFE in them. Additionally, as T3f*0n/PTFE is nonsticky in all directions, it needs to be baked at high heat (after first priming the surface) to stick to metal.
Logic will tell you that - unless you're baking it onto your car - the PTFE will slip off as soon as it hits the paint.
A final note on T3f*0n: (***Large International Corporation with loads od cash for lawyers***) involved itself with a car care manufacturer at the start of 2004. They are now putting T3f*0n in anything and everything they can think of. Even tyre shine. (I think that may be another hint as to the effectiveness of spray-on T3f*0n/PTFE. Who wants slippery tyres?). I have been unable to find any positive testimonials regarding this range of products. (***Large International Corporation with loads of cash for lawyers***) says the market for car care is about US$750M in North America. I guess they want a share.