I'm thinking that 5 coats of that Kiwi self-shining stuff may eventually crack. I sure hope not.

My experience with leather starts with shoes and combat boots. Yes, long ago they were black and you had to shine them.

Treat the leather with organics to get it supple and to protect it from cracking.
Smooth the leather surface physically if it's really rough. Emory, stone, ultrafine sandpaper.
Easy on the dye, just get color into the leather.
Polish to add color depth and protect it. Layers of thin polish, don't go overboard.
Neutral to cover the colored polish, or you'll wear it.
Then ride to butt-buff to a shine.