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It is indeed the billion dollar question. Everyone will have their preference, usually based on what they've tried, as well as what they can afford and other criteria (durability vs appearance).

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I wonder if you'd end up with a pink car though? 
All you're left with is a fine mist of water spheres rolling off like beebees...I've tried quite a few high dollar and low budget sealers and waxes, and finally have my own favorite for the last few years. I mainly use Rejex sealant, and sometimes top it with Poorboys blue/dark carnauba for a little extra show/gloss.
Living in Florida I've always had trouble keeping wax on my paint. The problem with most "waxes" is they literally melt right off the paint just sitting in regular sunlight. Once the paint gets over 120 degrees in the sun the wax turns to mush, and a quick rain storm washes it right off. Also simply washing the car takes regular wax off while your drying it.
I only got about 3-4 weeks out of a coat of regular wax, or carnauba wax. Then if you get some synthetic waxes they last 3-4 months, but they're not as glossy. I tried a two part product called Jeff's Werkstatt, beautiful wet finish but expensive and takes a long time to wax the car twice in a row with both parts. Then there was the Zaino product, another pain in the ass that is. You gotta mix a couple drops of hardener into the wax, then have a time frame for applying it, then wait 1/2 hour before removing it, then do the whole vehicle a few more times to fill in scratches/swirls....screw zaino.
My customers use Rejex on their airplanes so I tried it. It's bad ass stuff. It's the slipperiest stuff I've ever used. It goes on and comes off super easy, even in direct sunlight. When you're done the paint looks wet. It lasts for 6+ months which is great because the Expedition takes forever to wax. Love bugs don't even stick to it. It's a synthetic sealant but also has an ultra glossy finish. Some paint jobs have a slightly orange peel finish from the factory- those aren't good for Rejex because it's such a hard gloss that it makes microscopic imperfections like orange peel stand out, it's just so glossy.
UGH! too much work! haha i think one day this summer im going to go pay to have this all done. washed, polished, waxed, and everything else to make her like a show car. i bet i can find a mexican to do in a few hours.
j/k 