Zet said:
Yep you are wrong
It's called dual action because in Meguiar's terminology it both "cleans" and "polishes". They also have "pure polishes" that doesn't contain abrasives. I read a post by Mike Phillips that stated that M84, M82 and M80 also could be thought of as "dual action" polishes in the same regard.
Also it doesn't contain fillers, it contains lubricating oils as do most other polishes, just wipe with a MF and some water/QD and you'll see the true surface.
My guess is that maybe M83 contains more chemical cleaners than IP, which helps remove the paint transfer :nixweiss
I think you are both right.
Meguiars calls it dual action because it has cleaners (ie abrasives/polishes) and pure polish (glaze) in it. Meguiars refer's to "pure polish" as there trade secret oils, which is nothing more than a glaze.
That said, Meguiar's glazes (or purepolishes) have never really "filled" too much for me. They seem to be more like RMG, in the fact that it will fill a little, but seems focused more on increasing the wetness of the paint. Its more for gloss and less for defect removal.
So yes, Meguiars #83 has the potential to fill slightly (based on the "polish" part) but the amount of filling, IME, is so slight that it would not mask deeper defects and swirls. It can mask rotary trails (but even then, it filling is so slight that you can still see trails).
I think #83 has more cut (slightly) then Menz IP, but this is just a feeling. I have seen paints where #83 cut more and paints where Menz IP cut more. Personally, they both react to different paints differently, so depending on the conditions and paint you are working on, each has a place IMO.
So times its best to do one area with #83, and one area with IP, and see how each reacts for you on a particular paint.
The one thing I do like with #83 is that it will work on any paint well. Some paint will cause IP to hop or grabb, or dust, and #83 has always been in my bag to get me through those difficult paint jobs.
I would say that SIP does have more cut then #83 most of the time. So in terms of cut, from most to least: SIP, #83, IP.
However we tend to polish in dynamic enviroments on ever changing finishes, so no rules apply. No polish, IMO, is better at everything. Its good to a have a variety, and learn how to use each properly so you always have the right tools in the bag to handle the job perfectly on anything you face.