All I can say is I use Ultima Waterless Wash Plus+ Concentrate as my wipe done after my weekend drive arounds. I first use a really wet towel to get the biggest majority of dust brake and rosd grime only the weight of the towel is used no piece of crap Calf Duster or squeegee. I have Black Camaro and after sending close to 10 hr on my paint detail wipe and clean Before putting that cover on. THESE ARE MY STEPS ALMOST EVERYONE I KNOW THINKS IT'S OVER KILl BUT REMEMBER NO SWIELS IN 2 YRS. fIRST 1 thickness of WET TOWEL 1 thickness or layer WEIGHT ONLY TIL WHEN YOU PICK IT UP NO BLACK ROAD GRIME pOLLEN or dust the towel comes up white.A wipe down with mico fiber and Ultima waterless wash Plus + concentrate. Then the over kill but what I think helps the most.I buy flannel bed sheets and Polar fleese to lay on roof hang down the side trunk/hood any paint is covered with ultra soft cloth.Then the cover gets put on NOT slid on the cover never moves on painted surface. I told a few guys at CAR Craft how bad there paint looked this year and covervrted 3 over to ULTIIMA Waterlless.Its a no brainer you can make 32-22oz bottles of UWW+ for about the same as 1 bottle of Wizards don't need to say more on that!!I only maybe saw 3-5 cars at the whole fairgrounds that were swirl free and the majority use Wizards California duster I can't believe how many drag a straight edgded squeegee acros the surface of paint . Some shows some have to come in in the rain they get ther out comes the straight edge lets drag sand and grime across paint that was kicked up by the guy you followed in.Most in my state only buy what they can get at Auto Zone O Riellys Wal mart.They don't want to read what works on these sites or don't what to buy off the net. Mosty people are just cheapor afaid to do it themselves. That's it from me. because they feel the need to use a Minnesota based product and they can get it any where not me tried it did like it on Black