your favourite wax,detailer or polish

It depends on which car I am working on. On my '68 with 75% original paint, I use Comet in the green can (says right on the label, "Will not scratch delicate surfaces"). It doesn't either. Been using it for over 3 decades on dozens of light colored cars with nothing short of amazing results. I use it on the body, glass, rubber and all lenses on the exterior. Never had a problem if I wash the car in the shade and use a circular motion on smaller areas. Rinse well as you go.

On my '70, I use top shelf professional quality products. Meguire's is acceptable if you use their Professional Grade products. There are better options out there too, but at that level, it's all about the person who's using it.

This place has some of the latest products available.( http://www.esotericcarcare.com/ ) Keep in mind, if your final coating of wax, sealant or whatever you are using makes a huge or even a significant improvement in the appearance of your paint, your polishing and surface preparation is likely not up to what it could be if done properly. It's quicker and often easier to use a Band-Aid type coating to hide imperfections in your final paint preparation, but it's not the absolute best way to get the maximum potential finishing results for your paint. The link above has some amazing band-aids.