Ah, bring back the memories ....
But the SAF (NCC too) standard no need as kilat as the NPCC one. The latter recommended using -- as mentioned -- multiple coatings, kiwi-burning, a proper cloth & lots of water during the polishing itself. But it takes a lot of trial-&-error before one masters the skill. If you're impatient or overdo things, the kiwi will smooth out unevenly or even crack (from the thickness). If that happens, use a unwanted toothbrush to scrape out the polish & begin anew.
The acceptable army standard, unless it's for POP (or maybe OCS), is done via a shoebrush. Use it to, firstly, kiwi the entire boot prior &, after letting them dry out for a while, buff them lightly to get them to shine. The result won't be as sheeny as the NPCC version, but then it won't fade as much either. That's cuz the NPCC effect is only temporary, cuz the polishing uses a lot of water which then evaporates under the sun & causing the boots to dull again. In the old days, we'd resorted used to using spit to get the sheen to last longer.
Tip: Conform with what your buddies do. There's no need to stand out at all. if anything, it could backfire & gets you marked as an Indian chief.
If you really insist....
Try this... I learnt this method from my Bruneians Military Policemen..
1 Cotton CLoth
3 cans of kiwi ( at least 2 must be BRAND NEW)
few drops of water
and prepare to get dirty...
Apply foundation
Open up 1 kiwi ( old or new), stick your index or middle finger into it and dig out a large chunk of kiwi...
Rub it onto the boots. Then slowly spread the kiwi by massaging the chunk over the entire surface with your finger...
Apply layers
Next take smaller chunks of kiwi and spread it over the surface... keep spreading it until you cannot see the grains of the leather...
The end product will be a boot that is matt black and smooth...
Apply the finishing..
Now use your NEW kiwi... u see the top layer of the kiwi? do you see it reflect light?... Now u gonna extract that LAYER to your boots... Use the cotton cloth, slowly dab on the surface of the kiwi.. use very light force... press...
You should have quite a bit of the kiwi oil on the cloth... next, apply the layer on the surface of the boots by rubbing the cloth over the surface.. use minimal force...let it dry.... next damp the cloth with water and remove any tiny particles of kiwi on the surface
The end result a SUPER shiny boots that will last at least for three full days of parade...
Caution: This method is not recommended to apply on leather crease... it will Definitely CRACK... Apply this on the toecap and heel of the boots..