Originally Posted by Dylan@Adams

The PC is also a VERY mild approach to polishing... it would take a signifigantly aggressive approach and many many many many many times polishing to ever have to begin to worry about your clear getting thin.

In the end if you do a good job of maintaining the car once its corrected, do your best to prevent the introduction of new swirl marks, and only polish a couple times a year (which is how it should be if you do everything correctly) then you'll never have to worry about it.

The average clear coat thickness on a new car is around 2 mils... the more modern powdered and electro charged clear coats are thicker, but I'm not sure as to what process nissan is using so lets assume you're working with 2 mils.

If you were to go at your finish with an absolutely crazy aggressive approach - say 2000 grit sanding and then a heavy cut compound on a rotary you'd probably only remove in the realm of .2-.3 of a mil... assuming that you are caring for your car and the damage you're removing at this point is fairly minor the amount of polishing needed to get a flawless finish is going to be only a fraction of that.

Maintenance beyond that will only be an even smaller fraction of a mil... so in the long run the PC and most average swirl removing polishes and finishing polishes are going to remove so little that there really is no concern even if you are a compulsive PC polisher. LOL

Hope thats not to rambling of an answer.