Carr & Day & Martin Ko-Cho-Line Leather Dressing 225G Carr & Day & Martin Ko-cho-line Leather Dressing - 225 Gm. A unique thick, pink grease which protects leather from mould and mildew when in storage. Will not rot stitching and can be used on metal to help prevent rusting. This specifically formulated conditioner can also be used to renovate and revive tired saddlery. Not suitable for use on aniline or untreated leather, suede or nubuck. Apply a generous layer to both sides of clean, dry leather prior to storage. Test on a hidden area before use.