Hi, I recently purchased a dealer demo CPO 2017 Volvo S60 Inscription Platinum for my wife. 5K miles, great deal, with a solid warranty. It is Osmium Grey Metallic, which is not as dark as a charcoal grey, but still significantly darker than silver. As far as I can tell the paint it is near perfect shape (they keep them under hail/sun covers at the dealer), and it has probably been washed several times but not polished or waxed (it beads water, but has no swirl marks that I can see). I plan to clay bar it and then use a Duragloss 601 / 101 combo (I've done this to our red Mazda for its entire life, DG 105 every now and then, and it seems to work pretty well), OR clay bar it and then use either Collinite 845 liquid or 915 paste. Anyone who has used either or both on a darker metallic finish have a preference for one over the other, or other recommendations? We generally keep our cars 8 to 10 years FYI. Also, I generally hand wash/polish/wax 2 times per year, with the rest of the care being a combination of hand wash only and higher end automatic washes. Thank you.