My DH (active duty Navy) polishes my boots for me. Pre-DH, I had my original pair I first started showing in. I used conditioner on them…especially early on when I thought I was ‘softening them up’ a little to help break them in. I also used the bathtub method at the outset.
I eventually treated myself to a new pair (Der Daus). When they came, DH took them away from me and said “I am taking over their care and polishing - don’t ever let me catch you putting that conditioner on them or deliberately soaking them!” He told me that if I needed to put something on them to help me break them in (I did, they were PAINFUL at first) to put the conditioner on the inside of them and let it soak in. (it helped a little…but I’m not gonna lie, it was a more painful breaking-in than the bathtub method.)
But, now not only do they retain their beautiful luster but they are very comfortable - and they are stiff in the right places and broken in in the right places (as opposed to just being softer everywhere, and the finish being dull). I actually get a lot of compliments on the boots, sometime from total strangers, who ask me how I polished them. The boot toes look like patent leather, and I love it. I know these boots will last so much longer than the ones I dunked and conditioned, and they look so much nicer.
DH starts off with regular black kiwi polish (with a soft cotton rag. He says old T-shirts are the best.) Then, to get that sharp, patent-leather deep shine, he uses PURPLE polish stuff called Cordovan, that he says adds “depth” to the color. (You’d never know that he used something purple - it looks very black.) And then he puts Kiwi Parade Gloss on at the end, and buffs that with a spit-shine. It takes several ‘polishings’ before it gets quick and routine, but now in 10 minutes with a few basic touch-ups they look sparkling.
I should note, he does not apply ANYTHING to the inside calves of my boots, and the farther up from the foot he goes on the outside, he just uses the soft rag (T-shirt) with minimal kiwi polish. All the shiny stuff is on the toes.