hjkim550,
All I really use is Z-5 and Z-6. The Z-5 is like wax, and works better than anything I have ever used. The Z-6 is just a quick detailer and works great between washes. The Z-5 is great for black because it helps remove swirl marks and fine scratches. With your color car, Z-2 would probably be better. Hopefully Perfectlap will chime in ( he's our resident expert ).
Hope that helps...
Nick
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