CobraMan:
I am meticulous like you wouldn't believe with the 100% cotton (USA only) towels. Keep one for every purpose, sealed in a plastic bag when not in use, etc. I used the complete ZainoBros kit, and my '90 looks amazing. Actually got all the swirls out of the paint, and it is redder and redder each time I wax. My wife thinks I have lost my mind
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Its not the towels so much as the solution, I think. But its probably a good idea to stick with the coton towels.