I wanted to chime in here and give me $.02 on this product.
I got a chance yesterday evening to give the DP Rinseless Wash and Gloss a go on my '89 GT with aftermarket paint.
The car had been washed a few weeks ago with a regular process, and it is parked in the garage so it wasn't really dirty- it was just dusty.
I like a little more water in my bucket, so I went 3 gallons, with 1.5oz of DP concentrate, along with a grit guard. I had a separate bucket for rinsing- I actually rinsed out my measuring cup in this water so it had a small amount of the concentrate- I figured it couldn't hurt.
My wash media was the Cobra BONE- a sponge with a MF outside. I had two on hand and had both ready to go. For drying I used the blue waffle weave for the first pass, and the second pass with the purple Cobra MF- this was more of a "buff off" since the MF WW got most of the water off.
Since this was my first go I did not mess with the wheels since they were still clean.
All that said, I was very pleased with the results. I love the smell of the DP Wash and Gloss. The water didn't appear super slick, but the spongs glid across the surface effortlessly. I used no pressure- just the weight of the sponge, and lightly went over section by section.
Due to the big motor and no cats- I liberally sprayed the back of the car with my Clay Lube (diluted DP) to help add slickness and hopefully break up some of the crud before I wiped it down. It did seem to help, so I think it pays to have some of this stuff in a spray bottle ready to go!
Some notes- these Cobra BONE sponges rinsed clean in my rinse bucket super easily, agitate them lightly and squeeze them out, and everything came out easily. Because of this, I only felt the need to use one sponge on the car- if I ever have heavily soiled areas I'll use a separate mitt for below the belt line, and I also have a dedicated mitt for the wheels.
I did take care to turn the sponge to a clean side often, and rinsed after every section I did. My favorite part about this sponge is how much fluid it can hold. If you have a bad panel, you can just soak up more of the mixture and squeeze it out all over the panel!
This is getting long winded so I'll shut it down. In conclusion, this is my first rinseless wash, and definitely not my last! All told it was quicker than with a hose, and I got to do it at night- in the garage with the lights on and out of the elements!
The car looked great as it sat, but I went over it with the Meg's Quick Wax to add a bit of gloss and a TON more slickness- these two products seemed to work together well for my orange paint

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