Sort of timely post, I guess.
I just finished wet-sanding and polishing my DD yesterday (Christmas project). When I was done, I could have sworn that the sealants and waxes were not as glossy as the paint, all polished-up, by itself.
Polishing and/or Polishes
Your
finishing polish can and will make the paint very clear and glossy by itself, this would be the
polishing oils or lubricating agents, that you often times see people trying to get rid of by wiping the paint with IPA.
Most if not all professional grade finishing polishes are water soluble, so the clarity and gloss they create won't hold up over time, that is when the car is exposed to water in any fashion, such as a rainy day, a car wash or a wipe down with any quick detailer or waterless/rinseless wash.
A quality wax or paint sealant will hold up to water in any form and give the "entire" car a uniform appearance.
Nothing at all
Mark also brought up paint with nothing whatsoever on it. Overtime... this isn't going to look good unless the paint, in other words the "car" is placed into a museum environment where it is never drive or touched in any way.
After wetsanding, cutting and buffing a paint job, if the paint is still fresh, that is less than 30 days air cured, then stop after your finishing polish or application of a fresh paint safe glaze like M07 Show Car Glaze or 3M Imperial Hand Glaze.
After the paint is past the 30 days, then minimum recommended by most paint manufactures, then you can decide if you want to seal the paint with a wax or a paint sealant and this is where you want to,
"Find something you like and use it often"
The "often" part is based upon how the car is used and your expectations for the appearance level you desire.
If the car is truly a show car that is in a garage most of the time then common sense tell you that you don't need to apply or do anything to the paint or the car because it's not seeing any use.
If the car is a black daily driver that sits outside all the time and you "expect" it to look Concours-ready all the time then you'll have to use something a little more often than the guy that parks his rig in a garage all the time.
