Mop-N-Glo and similar products are clear gloss acrylics. Sometimes used to put gloss coats on models. Ise them after you get a smooth surface.
Getting a smooth surface. - Heat the Kiwi to get it to soak into the leather pores, what youare trying to do is use wax to build up to just above the surface of the leather, then you are buffing and polishing the very top and THIN layer of polish. Any extra polish just takes more effort to get to a good shine and can crack.
Spit - s;ightly acidic gives a good shine quickly but eventually the acid dulls the polish.
Water - like spit thins/softens the polish helps to get the thinner layers, but doesn't dull the wax. when it evaporates out..
Heat gun or similar to melt and soak first then buff down and then I use cotton balls with wax and a small drop of water. Then use a GOOD quality Brush and cloth to buff it to sheen. I use my Dad's WWII vintage horsehair brush and clothes.
I prefer to use heat only at the very beginning of the process when sealing the pores, after that it is overkill.
Then again I once saw a guy who swore by lighting the polish on fire as the best method, course he lit his shoes on fire about 20 minutes before an inspection formation once in front of the guys he was demonstarating his method to. I can't recall if the laughter at that time was more than after the inspection but he got no sympathy from anybody.