This'll sound wierd since nobody ever says this (plus how could you trust a guy with my lame username?) but I've tried Meg's NXT, that platinum turtle crap, and even the Blitz glaze and carnuba wax combination.
I wish I could afford Zaino though but so far the best wax I have found has been (believe it or not)......
Rain-X Ultra Wax!
It's only like 5 bucks too! I know it sounds odd but hear me out...
..when I first got my car I was washing and waxing constantly because I live inside Vegas's construction zone that is Rainbow + 215 and anything south of 215 and the dirt in the air being kicked up all over the place was such a hassle, I was constantly trying to keep it shiny. I didn't like the shine of NXT (or even the so-called "color-deepening" effect) or the shine of the plat turtle wax either. I didn't feel that they kept dirt off my car all that well either.
With Blitz I definitely like the shine but the whole two step process of the glaze then wax was tiresome. Then the layer of "protection" from the carnuba wax felt neat and made the paint glisten but it ended up doing nothing more that being some sticky trap for dirt. I remember going to the car wash and wanting to use just water to rinse my car clean (since I had just waxed it a week earlier) and the dirt would not come off at all. It was held in place by the wax! What good is this? Sure, maybe the wax would do if I was showing the car but driving around construction zones, especially with a carnuba based wax, did not work with me.
So I was looking around Wal-Mart and trying to decide what else to blow my money on that would end up not working well when I noticed everything was well over-stocked except for the Rain-X one. Only two were left. I said why not? It was only 5 bucks afterall!
Well the results are outstanding on my SS tC! It made the color so much deeper and richer than NXT (which claimed it would do just that but didn't), my car actually started looking bluer, it's that rich and the shine is out-standing! As good as, I'd say better than the Blitz combo! Not only that but the very first day after waxing I got caught behind a full-of-holes trailer with, what do you know, a hunking pile of dirt in the back on a very bumpy road for a couple of miles or more. I could see and hear the dirt hitting my car after every bump.
You know what though? I haven't waxed my car in at least 3 times, probably 5 times as long as I did with the other waxes! Yet it looks just as good as day 8 with the others (except for the side skirts where dirt can't help but collect, afterall I now take the shortcuts through the dirt instead of avoiding them for not wanting to dull my car's shine). I have sprayed it down with water alone at the car wash and let me tell you, it lives up the the Rain-X name! Most of the "troublesome" dirt came right off, 90% of it compared to 50% with the others and even now it still shines like week 2 with the others when it's in actuality more like week 8.
Don't believe me? Well I've heard of a normal, non-car enthusiast person recommending this wax after I had the pleasure of discovering it myself. How often do you hear that, a normal person! If a normal person vouches for it then it goes to show that it does work! Plus I'm telling you!
It's really good, it's not carnuba but it shines just as good if not better and the protection it offers is unparalleled by anything off the shelf (that I have tried) by a LOOOONG shot. The sheeting action is a thing of beauty, especially when you have the windows Rain-X'ed too. I HIGHLY recommend this wax.
Be careful though, the crap dries out your skin horribly so you should wear gloves if you do use it (and it warns you of this on the back too, another thing that got me to try it out....and it's a warning you should heed).
Seriously, 5 bucks...give it a try.