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Definitely go with Meguiar's Endurance. I'd been struggling with the same problem as you for months, using sprays that made the tires black but only lasted a couple days and attracted a lot of dirt. The sales guy at auto zone recommended Endurance, and I'll never go back. Does take a little longer to put on as it is a gel you have to apply by hand, and if you really want the tires to shine, you'll want to put on two coats. However, one of the most beautiful shines I've ever seen, and lasts! My last coat was two weeks ago, and the tires as still shining like I just put it on, and we even had a rainstorm last week. Try it out, you won't regret it.
For this Endurance gel, what kind of cloth do you guys use rub it on?
Do you squirt it into a cloth and rub, or do you squeeze it from the bottle onto the tire and smear?
I just use an old cloth applicator pad I don't use. Found it tons easier than using a microfiber.
And yes, Armourall is ****. Right now our auto store is having a contest to see who can sell the most Armorall products. I'm constantly getting in trouble with management because I absolutely refuse to tell people that Armorall products are good.