Hmm i dunno what site those are but according to the president of Collinite Mike Taylor which i spoke to personally, 845 and 476 is actually the same save that 845 is the liquid version, and even if you ask me and my detailer friends all of us use and agree that 476 and 845 looks the same, 845 just has a shorter durability than 476
next with the 845-476-845 suggestion, thats going to be quite counterproductive in a way, the general rule of thumb is always use the toughest wax first, if you slap on 845 on top of 476 chances are you'd be removing 845 and just putting 476, if you really want a good gloss properly prep and polish the paint
next as for the 915 being just a more expensive version of 845, i really beg to differ on that, yes 915 has more carnauba content thats why its more expensive and thats why it looks better, and the difference isn't not that much, its a LOT! 915 produces a far better gloss depth and shine than 845, i am actually inviting you one day to attend a seminar and try and apply 845 and 915 on a black car so there you would really see the difference.
and as for 915 being a waste of money i think thats a bit subjective since if it would be my point of view buying 845 and 476 would be more of a waste of money than just buy 1 tin can of 915, if your problem is 476 not really shining that much and you prefer 845, why not try 915? it produces a better look at the same time it lasts just a little below 476, not only do you save yourself from buying 2 products based on your advice since you just buy 1, you also save time and effort as well.
i don't know which site you base your review on but the best review someone can make is when you personally review something and compare it to other waxes, and in nearly all the sites i've found i've never come across a site that actually says 845 is about the same as 915





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