Been there done the candle, teaspoon and Kiwi, along with cotton wool, hot water, after shave and spit! Same in the RAF and if they weren't up to scratch, you would often find the drill instructors foot print on your toe cap :(
That's how I'm teaching my kids! I have to say though with all the different types of show finishes out there, suede, nubuck etc. I do also use creams, waxes and even dubbing, in fact my Barbour wax goes on just about everything and i still use Kiwi
Agree KITT, it is satisfying to put down a well polished pair of shoes