Bloody boot polish.

[daveatdave]

Lether oil is good 

[Muddy42]

For boots, I use polish then something called G wax.  If you leave the boots in a warm place for a few days before using them again, it really sets hard.

 

People tell me old fashioned dubin rots the threads, but I've now way of knowing this is true.  Recently I melted up several old dry polishes and dubins with some linseed oil to use them up.  Its great for my second pair of boots or leather that you don't mind going a strange colour!