I've waxed my car once by hand and had to keep whiping the sweat from my forehead! I've always heard that orbital machines leave swirl marks. Is there a certain technique to prevent swirl marks?
Anything that will scratch your clear coat = SWIRL MARKS...
But mainly DIRT...Dirt on the car, on the towel you wipe the car with, on the applicator you use to apply wax...
Typically, swirl marks are self induced by the owner when applying and removing wax, by using dirty rags, instead of being anal about only using clean microfibers and foam applicators... Think of it, they are swirls, not a coincidence that you are making the same motion applying and removing wax...
EXAMPLE: You wiping off your front facia, and you spot a bug carcass, a stubborn one, that won't just wipe off, so you get after it with your fingernail, guess what, you just scratched your clear coat...
Orbital buffers don't leave swirl marks...This is an old wives tale...Viper owners who don't know how to use them leave swirl marks...