I was already a fan of Duragloss products long before buying my "garage queen" - 2012 Mercedes ML350 in "Diamond White". It is a beautiful paint and a $1600 option so I wanted to treat it right. Here is what I did when I brought it home from the dealer. First, I washed and clayed (although the clay bar showed very little rail dust or other contaminants). I used a mild clay (Griot's and their Speed Shine for the lube). I then wanted a clean surface and there are few products that can match P21S Paintwork Cleanser (I think they must have made this for Mercedes paint because it came out perfect!). I always used Klasse AIO before but P21S is, imo, the better product for paint cleaning although it is not considered an AIO like Klasse. I think recently introduced there is a pure paint cleaner in the Duragloss line called Squeaky Clean and it is suppose to be very good. You may have to call them to order it as I am not sure if it is in the mass market yet. Unlike 105 or 501, it is a paint cleaner without any sealant.
Once the car was prepped I was ready to use the Duragloss products. Since the car was so new and perfect I skipped a heavy polish and only applied a coat of one part 601 bonding agent to four parts 105. I waited until the next day and applied a second coat although it really did not need it. As with the P21S, I applied these products thin using Griot's 6" Electric Polisher. I maintained this using Duragloss AquaWax about every second or third wash. Sometimes I applied AquaWax as a "topper" when the car was dry and sometimes I used it after my rinse as a drying aid. It works both ways. Whenever I decided to go with a rinseless wash it was either ONR or Duragloss with AquaWax (I think I prefer the Duragloss rinselss but both are really good).
The second time around I tried something different - instead of two coats of 601/105 I applied only one coat with my second being 601/111. The 111 is unlike 105 in that it is pure sealant and has no polish. It is also a bit "brighter" looking (some might call it "sterile") with a "candy apple" sheen to it. They say it is not as durable as 105 but I put something on my car every few months so durability is not a real factor. I've also use Collinite 845 as my LSP over Duragloss and it is great looking and very compatible with Duragloss. I've also experimented with different "toppers" besides AquaWax including OCW, CG's V7 and Griot's spray wax. They all work with Duragloss and all enhance the shine. My current favorite is Lucas Slick Mist. It smells like bubble gum and is as versatile as AquaWax - and looks just as good.
So there you have it. Probably more than you wanted to know but that is my routine with Duragloss on a newer car. Duragloss has products for all conditions of paint but I would stick with their products primarily for newer or well maintained cars. I think there are better compounds elsewhere for abused paint.