I had this in mind when my new car arrived and I was (and remain) determined not to use the PC on it and do any "polishing" by hand - this seems to have worked this far and like Accumulator said, I tend to accept imperfections in my daily drivers way more than my garage queen - and I've not washed GF's car in, cough, 5 weeks
I guess I've to a degree used the garage queen as bit of a test bed for new polishes and glazes and I've noticed some thinning of the paint on the roof and a small section on a raised lip on the bonnet - PC or not I can't be sure but I now avoid those areas with the PC (which I have to say has yet to be beaten by anything other than deep scratches on any of may cars)
Plus my garage queen's been away for some time having new uprated suspension fitted in a converted chicken shed on a farm down a potholed muddy track :shocked but hey she now handles and drives superbly
I have some Sonus pads on order and intend to use only mild polishes on her as there's nothing requiring anything more aggresive - the markes which mild polish/PC can't remove are probably there until she has a repaint - which won't be until after June 06 when I get married.

I guess I've to a degree used the garage queen as bit of a test bed for new polishes and glazes and I've noticed some thinning of the paint on the roof and a small section on a raised lip on the bonnet - PC or not I can't be sure but I now avoid those areas with the PC (which I have to say has yet to be beaten by anything other than deep scratches on any of may cars)
Plus my garage queen's been away for some time having new uprated suspension fitted in a converted chicken shed on a farm down a potholed muddy track :shocked but hey she now handles and drives superbly

I have some Sonus pads on order and intend to use only mild polishes on her as there's nothing requiring anything more aggresive - the markes which mild polish/PC can't remove are probably there until she has a repaint - which won't be until after June 06 when I get married.