Didn't really read it anywhere. I know on the Meguiar's & Autopia Forums they've always discussed and argued about Meguiar's waxes having just a little bit of "cleaners" in them to allow better bonding on the paint and since M21 is supposedly the professional version of NXT, I assumed they would also have those "cleaners" in the formula for better bonding?
Yeah the NXT/M21 "Cleaner" topic has been a hot one ever since 2004 when NXT was launched.
They originally both had a sleight amount of cleaners in them because,
NXT marketed to Joe Consumer, that is the average person and as we all know the average person is driving an average daily driver an really only knows, wash car, wax car, so in order for the wax to last and thus protect, a sleight cleaning ability was given to the product. It's still not a product that is recommended for use on a car with neglected finish. If anyone is working on a neglected finish they should wash, the CLAY and then using some kind of pre-wax cleaner to clean the paint an prepare it for application of wax.
M21 is formulated for and sold into the Professional Detailing Industry and it's pretty standard for the production side of this industry to mean buffing out neglected paint using a one-step product. M21 is best used on finishes that like NXT are washed, clayed and cleaned till the paint is smooth before applying M21 but if you apply M21 with a rotary buffer and a wool pad you have power and the aggressive bite of the wool fibers which by themselves are an abrasive, so together with a smooth, cream liquid actually designed to clean a little and be used on paint, you can get some pretty good results with this approach but that doesn't make the M21 what could be considered a normal cleaner/wax like is usually meant by the term, idea and placement into a category.
I don't personally but anyone reading this can have their own opinion.
I can't believe 6 years later I'm still typing about cleaners in NXT and M21...
Ugh....
Here's the last time I used M21, after a very thorough wet-sanding, cutting and polishing process I machine applied M21 and the next day,
after the below pictures were taken I applied Füzion.
If it has paint... it gets polished...
I followed this with a machine applied application of M21 Synthetic Paint Sealant, for this used the Meguiar's G110v2 with another W9207 Foam Finishing pad on the 3.0 Speed Setting.
Note the placement of my left finger, I'm stabilizing myself as I lean out to seal the center of the roof but instead of touching any painted portion of the car I'm using the trim surrounding the window. At this point there are not defects in the paint and any new defects will show up like a Sore Thumb.
Shake shake shake... a small circle of product onto the face of the pad
I use the "Kissing the Finish" technique when machine applying a liquid wax or paint sealant, that is instead of taking the wax you see on the face of the pad and simply squishing it up into the foam by placing the foam pad flat against the paint, the Kissing the Finish" technique is where you touch down just an edge of the face of the foam pad and deposit a little of the wax to a portion of the panel you're working on.
Then after you've Kissed the Finish in a few places, take what's left and place the face of the foam pad against the paint and THEN turn the polisher on and begin making overlapping passes over the paint.
UNLIKE removing swirls with a DA Polisher where you only want to work a small section at a time, (about 20" squarish or so), if you've removed all the below surface defects and now you're just applying a wax or paint sealant, you can work a section as far as you can reach as long as you have ample product to spread out. For the hood of this El Camino I can easily reach and work on half of the hood so I use enough wax to coat over half of the hood and move the pad over each square inch at least 2-3 passes to sufficiently work the sealant over and into, (to whatever level possible), the paint.
As I come up to a dab of wax from where I "Kissed the Finish" with my pad, I tilt the polisher, lifting the leading edge of the pad but maintaining constant contact with the trailing edge of the pad and then run the pad over the dab of wax and then immediately lay the pad flat again and then work new territory with this new dab of wax.
Tilt the polisher a little to lift the leading edge of the pad...
Then lay the pad flat and begin working the wax or in this case a synthetic paint sealant over the paint.
And here's what an ample but thin, well worked-in coating looks like after machine application using a DA Polisher.
I'm using the Flash to highlight the coating of sealant otherwise it just doesn't show up very well...
Next I'll remove the dried sealant and let the protection ingredients left behind fully set-up over night and the next and almost last step will be to hand apply a layer of Füzion.
Then re-attach any trim components, check for wax in the cracks, (shouldn't be much), then take some after pictures and some after video and then return the car to the owner.