I use regular kiwi. I had a pair of plain toe shoes go bad on me after 3 years of wear (three times a week.) The inside cracked and started to come apart but the outside was spit and polished with black kiwi. I blame myself though. I did not use shoe trees and sometimes wore the shoe on back to back days.
I have never been a fan of Zymol, never lasted long on daily drivers was meant for more show car type finishes which see maybe 3 days of sun per year. My car is outside 24/7 in the north east and gets Zaino. The last step protectant product is not the most important however, its what you do to make the paint as flawless as possible prior to putting on the wax/polymer sealant (ie paint correction with various polishes and clay bar to remove contaminates.) www.detailsclub.com
are very good sources of information just like SF
Anyway back on topic. Lincoln was good and used it while in the USMC for spit shining but my Danner Acadia's have been polished (not spit shined) with Kiwi Parade Gloss since 2000 when I got them and I still wear them two or three times a week. I do need to get the soles replaced though.
+1 on Kiwi.