An old falconry recipe for treating jesses (leg straps) and leashes (when we used leather)
1oz beeswax
2.5 oz white wax - good quality candles
5oz liquid paraffin
Melt together over lowish heat.
I have used this for years and applied with fingers it softens and gets absorbed.
Jesses have a fairly short life, months rather than years. They are subject to regular wetting, blood from food and other detritus.
I can't say if it has any long term effect on the leather.
I thought it was surprising nobody had mentioned liquid paraffin as an ingredient. Any thoughts?