I like it as a drying aid. I did have a bit of smearing one time on windows but it wiped right off. On paint it wipes really well at 2 oz. per 16 oz bottle. Not to lead anyone astray, the question I do have is how it will perform mid summer on windows. That will be the real test. I have only used it in the fall here in NC. Not drastic temps.
On a side note, RippyD now has it going a full 4 months in his test for beading water. That’s ridiculous for the cost of 64 cents per 16oz bottle of QD. I may use 931 for paint and my remaining gallons of P&S Beadmaker or McKee’s extender spray wax for windows if 931 does in fact streak. Both work great on windows.
I have tested it side by side on a hood vs Bead maker and the beads were identical. Both produce larger beading than ceramic as would be expected. Beadmaker was slicker but only by a tiny, tiny margin. Maybe I will have to recreate that test and take pics for you guys.
I’m not a detailer. But if I was, DG931 would certainly be in my arsenal for a final wipe-down. Results may vary depending where you are in the country but I would not hesitate telling anyone to pick up the small bottle of 931 to test. Really good lubricity for a Rinseless and a crazy cheap QD that is slick as heck and can last 2-4 months by itself. There is a detailer online who uses DG931 and another brand (GD) mixed together to do high end cars.
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