It is not the wax that matters, it is much more complicate process that you cannot rush into, surface preparation is the most important step. Washing regularly, at least once in a week for daily driven cars is a must.
Maintaining showroom condition is difficult for daily driven cars unless you have T-car(spare car for weekend ride) :p
Below is an article that quote from AutoPia
SIX PERFECT SHINE REQUIREMENTS
The perfect shine comes when your car's paint finish is in good condition, free of surface contamination, polished, glazed, protected and waxed. Let's look at each of these requirements individually.
Good Paint Condition
For the first 12 to 18 months of a new car's life, the paint is relatively oxidation-free and in good condition. If you maintain your new car's paint with regular washing and protection, oxidation will remain minimal, and cleaning the paint will be a minor task. At a minimum, you should wash your car weekly. If you don't have time to wash weekly, use my Quick Detailing process.
Contamination-free
As you drive your car, debris from the road (i.e., tar, oil, bugs, etc.) will lodge itself on your car's paint. The longer this debris is allowed to remain, the more difficult it is to remove. This is just one reason that regular washing is so important. While outside, your car will also collect other contamination. (Birds, bugs and neighborhood kids seem to have a natural attraction to beautiful cars.) These contaminants must be removed; you can't wax over them and expect to get a show car finish.
Polished
Polishing is necessary to remove minor blemishes, including surface scratches, swirl marks, pitted areas (minor road stone nicks) and scuffs. When polished, the paint finish will feel perfectly smooth. Your hand and polishing towel will literally glide over the surface. Feeling a perfectly polished car is a stimulating experience for most car nuts. There's nothing quite like the polished fenders of a curvaceous Porsche, Ferrari, Viper or Corvette.
Glazed
Glaze is a term that's grossly misused in detailing products. Glazes are paint treatments used to fill small surface scratches and swirl marks. To a painter, glaze is the term used to describe the process of restoring full paint gloss. In The Perfect Shine, ultra-fine polishes are used to refine the paint finish to achieve or restore full gloss.
Protected
Paint is protected when it's sealed from the elements. As we've discussed in previous chapters, synthetic sealants offer the best protection. Synthetic coatings are five to ten times more durable than the carnauba waxes. They offer extended protection from the elements and create a super-slick surface. In The Perfect Shine process, the synthetic protection is an acrylic sealant. I have not found a polymer sealant that works. I will explain why later.
Waxed
Waxing is the final step of The Perfect Shine. We're not talking just any wax here; we're talking about a pure, natural carnauba wax. Pure carnauba waxes don't have cleaning properties or synthetic compounds added. They are made from a blend of carnauba waxes, beeswax and natural oils. A quality show car wax gives paint depth and warmth. I know, I know, it sounds like we're talking about a fine wine or something. Just don't underestimate the value of a great show car wax when it comes to the final results of your car's finish.
Now that you know the six requirements for The Perfect Shine™, I'll share with you my personal tips that keep my cars turning heads. The first thing to know is that I treat my toys differently than my daily driver. It's very difficult to maintain a perfect shine on a daily driver, unless you only drive it a mile or two a day. Show cars (toys) are easier, because their job is to stay beautiful.
Quoted from AutoPia org
