The two Mercedes and the BMW I did this past weekend in upper 30s to around 50 degree temperatures and 20-35 mph winds. The way the owner's driveway is situated, the wind just kept swirling, sort of like working in a dust devil for about 15 hours over two days. Fun. Not.
I detailed all 3 interiors on Saturday along with the exterior of the ML430, and the exteriors of the ML500 and 740 on Sunday, finishing about 20-30 minutes before sundown both days. It was a loooooooooong weekend.
2000 Mercedes ML430. I've been taking care of this car (and the 740) for about 4 years now, once or twice a year. The owner is pretty meticulous about his cars, regularly QDs with either
Meguiars Quick Detailer and Griot's Speed Spray. Anyway, other than some major polishing on the 7 when it went through the body shop at Moritz and was covered in rotary swirls a few years ago, neither has needed any major polishing.
I used Clearkote's Vanilla Moose v2 with a
Lake Country polishing pad and applied Poorboy's Natty's Blue by hand. Simple combo, very wet finish.
This shot isn't out of focus, just the orange peel so common in the 1st gen MLs and the lack of a macro lens for close shots make the reflections less crisp.
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1996 BMW 740iL. Yes, a 10-year-old 740 which he intends to keep as long as Bangle does the 7 series designs.
A couple small scuffs, etc but nothing major. I went with Optimum Polish and a
Meguiars polishing pad. I removed the excess with Optimum Car Wax and then sealed the car with Jeff's Werkstatt Carnauba Jett. CJ works very well over OCW, seems to glide on pretty easily. BTW, CJ is a touch tricky at first but the best method I have found to apply and remove it follows:
1. Use a
Meguiars Supreme Shine Microfiber. Too deep a nap and the towel drags and tries to unfold.
2. Spray onto one section at a time. Using teh Supreme Shine MF, work CJ into the paint until is pretty much is residue free, then flip the towel for a final wipe.
Carnauba Jett seems to hold up well too. I've had it on a couple of black Chevy Silverados, one for 5 weeks, the other for 7 weeks now. Both are conventionally washed (hose washed) and both bead very well and the slickness is still very noticable. Seems on par with
Meguiars #16 or Collinite 845 at the same point. No special prep on either, one had been waxed about 8 weeks earlier with Optimum Car Wax, the other hadn't been waxed in 6 months. The beading characteristics of the truck that had OCW on it are still really tight, typical of CJ, not the somewhat larger beads you get with OCW.
But I digress....
and try some on the hood of the wifes 740. I used a green cobra MF that has average (IMO) nap to it. It seems that if I applied too much of the CJ the MF would want to fold like you said. So I used a little less and was good to go. The CJ worked on and off pretty easy IMO. 
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