QUOTE(efaceninja @ Aug 6 2014, 10:38 PM)
not comparing the 2. i'm just considering want to take D155 together with D156 or not. D155 spray wipe, then after that D156 spray wipe... both are consider optional steps if i wash with wash&wax weekly i think, and rewax like... 3-4 months once?? just that D155 & D156 combo is very convenient and fast to make the car looks instant shiny.
Convenient and fast aside, need to consider the price for those stuff too.. so.. get D155 first maybe.
Well...I've been using them (on and off) and a few others for quite some time now.


Here's my takes on QDs and spray waxes.
I only use QD (M34) for clay lubricant and also (Last Touch) for light cleaning when/if I missed some spots AFTER WASH. I don't feel comfortable using it to 'clean' light dusting after a few days, regardless if the car had been driven or not. I just let it be and leave it that way until my next proper wash.
If I were to do (which I very seldom need to) that kind of 'cleaning', I would prefer to use a 'no-rinse' or 'waterless' product instead. For these, I would alternate between Optimum No Rinse, Duragloss Rinseless Wash or Megs D114 - Rinse Free Express Wash - my current favourite. These products are more economical to use. I use at 2oz to 1gal dilution (around 1:64) in a spray bottle and spray liberally or at 1oz to 1gal (1:128) if using a wash bucket.
M135 also I only use occasionally for spot removal of stubborn dirt marks or when I see light water spots had started to form AFTER A PROPER WASH. Like I said before, M135/Ultimate Quick Detailer is loaded with solvent and it cleans these type of contaminant really really well. But again, mind you, it could also strip or weaken the existing wax/sealant.
For Ultimate Quick Wax...now...this one is a good topper, and also use it AFTER WASH.
And here's my suggestion. If you were to start with one product, I would suggest you get the D156 first. Very rarely that you would need to do a round of QD after a good wash unless there's something wrong with your washing. And also a QD won't be able to do much on the appearance side. D156 would be more suited and meaningful to use after a wash, to top up the protection and amp up the gloss. To tell you the truth, before I have the glass coat on my ride(s), I use to top up with one form of spray wax or another *almost* after every wash

And do consider using Optimum No Rinse or DG Rinseless Wash (these two are locally available) if you decide to do those 'in-between wash' cleaning instead of using a QD. They cleans better and *maybe* safer as these were meant to be use as a light wash instead of just for *light* clean up.