Wax/Polish of Choice

[JCL12]

In the last 6-8 months I have used the following waxes on my cars (or cars I helped wash):

-Meguiars quik wax (spay) - spray on carnauba wax that does not last long at all. If you put too much on, it is very hard to get off. I do not like this stuff at all
-Meguiars NXT Tech wax (liquid) - this is the normal stuff I use. It goes on/off easily, beads well, give a nice shine. It does not last as long as I would expect a polymer to last. If your car is outside in the heat, this is gone in 2-3 months and maybe sooner. I have heard good things about NXT tech wax 2.0 for better longevity.
-Meguiars NXT tech wax (spray) - I've used this for touch ups and it goes on really quickly. I like so far but have no clue how long it lasts.
-Eagle One nano wax (spray) - I bought this since it doesn't haze and I figured this would be for very quick supplements after a wash. It does not last long at all and I wouldn't buy it again.
-Meguiars carnauba cleaner wax. I haven't used it in a long time so I dont remember much about it. I don't see myself ever using it again so I probably wasn't impressed

The next waxes I plan on buying are Meg's NXT tech wax 2.0 (liquid) and Optimum Car Wax (spray). I have heard many good things about OCW in that is lasts a super long time and does not haze - it might be the best of all worlds.

I would personally lean toward polymer/sythetic waxes instead of carnuaba for the added longevity and ease of application. For synthetic waxes, I don't think it matters one bit if it is paste or liquid. One form or another should not do much for performance - I think reason the wax companies sell synthetic wax in paste form is for personal preference on container and psychological/marketing aspects of paste being better.

I have never used coloed/dyed waxes

[rick3000]

I have just used regular Hard Shell Turtle Wax in the past. It does the job, and Turtle Wax has been doing this so long they know how to make a quality product. Although, I might be trying something new when I detail my car this week.

[boxs2000]

The last 2 years I have been using zaino. It is awesome on black/dark cars. It is a long process to apply, but worth it. This is what I use for my Porsche. Recently I clayed my daily driver a Lexus LS 430 and after claying I tried out the Meguiars NXT and I was amazed at how easy and the wet look it gave my DD (light color Seafoam green) I did notice that it does not seem to last as long. So for your black Pcar I would go with Zaino... heres proof

[SilentThunder]

Pinnacle souveran for black. best there is.

[Perfectlap]

You probably need to invest in a real buffer and buy some menzerna intensive polish I and II. It will get the paint as free of imperfections as you're going to get it short of repainting. I've seen some real miracles with a porter cable orbital buffer and menzerna. There was one 993 Turbo restoration thread in one of the forums that a detailer in Spain put out. Really amazing. The paint was a total mess before. Looked brand new after a good 10 hours of work.

As for the white specs, if those are chips those can be minimized as well. There's a technique where you use the back of a nuber 2 pencil eraser. You take a 3 hole punch and cut out piece of 2000 grit sand paper, glue it to the eraser. Sand the chip hole by turning the pencil into the hole so that is flat. fill the chip hole with touch up paint (Langka paint pen), enough that it forms a little paint pimple. Wait an hour or two for it to cure and then take the 2000 grit sand paper and sand it down so its flush. Voila. You then wax the surface with an acrylic wax with fillers.
If the specs are just contamination it will come out with the proper amount of torque from a porter cable or Cyclo polisher ($130-$200).

As for waxes of choice, I think it often depends on the owner. If you're a guy who is cleaning the car every week you don't need a very durable wax so really any autostore wax (Meguiar's, Mothers, etc.) or boutique brand(Poorboys, Zaino, Klasse) will do. If you only wax once or twice a year you should use a more concentrated wax which the boutique brands tend to be. The autostore stuff is usually watered down a bit to throw in some of the idiot factor for a novice.
If you look in my garage cabinet I've got one bottle of every imaginable brand of car wax and my conclusion is that they all give you 99% the same result. Some are very expensive some are just as concentrated at bargain prices and some are just cheap and require a bit more effort but will give you the same end result. The key is to do allot of claying, paint cleansing and swirl removal before you even begin waxing. If you spend 20 minutes waxing you should be spending twice that amount of time claying and cleaning. Swirl removal is almost impossible by hand without spending hours.