User24, excuse me if I'm wrong but you sound like a young guy with good intentions but Ithink possibly you need to re-evaluate a lot of your processes and priorities from a bigger picture perspective. First of all, regardless of all the nonsensical ways you guys went back and forth trying to justify it, at the end of the day, week, month, or year, it's all about TOTAL MINUTES spent on the car to maintain the look you want. It's silly to think you're coming out ahead by doing 40 mins a day compared to one wash a week..and it comes down to what you said about impressing people - what the heck are you doing qd'ing your car for 40 minutes every day?! Do you think people judge your worth by how spotless your car is, or do you have an OCD problem worthy of a psychiatrist(this is not entirely out of the realm of possibility considering the degree to which you're timing everything -LOL

)? And that question is coming from an autopian, which by 'normal' standards is already coming from a fanatical perspective..As posted above - a car that's properly cared for and even washed weekly will get just as many compliments from the masses, if that's important to you. One more comment on impressing people and perception - I will tell you that I GUARANTEE more people look at you and ask whats wrong with that guy, or think you're weird for covering and uncovering your car every day than people that see your car and think wow how cool, that car is so clean...The fact that someone is that nuts about covering the car daily (and I'm assuming it's not a lamborghini or something of the like which people would understand covering) will definitely cause some notice. I would expect comments like 'that guy needs a life' or the sort when you go that far 'over the top'..
As far as your paint thickness comment goes regarding pc vs qd..I don't think they're really apples to apples - because most of the time if there's any dirt the qd will be causing some minor scratching/marring, whereas pc will be correcting it. However, the point is moot because you can polish that paint out with the pc more times than the years you'll own the car. If you do searches for people with paint thickness gauges, you'll read see the pc's really don't remove much clearcoat.
QD'ing will not 'build up' your LSP layer or add to the protection, more likely than not it will degrade it due to the cleaners.
Overall I think you're doing waaay too much to your car, and again that's coming from an already fanatical autopian perspective. I think it's been well covered already that most here would find it preferable to do a 'real' wash if you can rather than qd'ing. I think you should challenge yourself to go a day with a few water spots on your hood without getting your feathers ruffled...it sounds like there may be more philosophical agendas to overcome than detailing

No offense intended, just one man's opinion.