Hereās the process I used to weather my Abyss Watcher jacket. Ā This got rid of the glossy coat, darkened the color a bit, and also gave it a more worn appearance. Ā Iāll show the final result later this week!
I recommend either doing this outside or wearing a respirator, as some of the chemicals release fumes that probably arenāt healthy to be breathing in. Ā Nitrile gloves are also a plus. Ā Rubbing alcohol and acetone in particular severely dry out skin (thatās why they work well for weathering leather :-P). Ā
1) Apply isopropyl alcohol (IPA, aka rubbing alcohol) to remove the gloss coat. Ā I squirted it on liberally and then rubbed it off with a paper towel. Ā Youāll need to rub the leather quite a bit to remove the gloss coating, adding more IPA as necessary. Ā If you want a more harsh effect, you could use acetone (found in nail polish remover) instead of IPA. Ā Acetone tends to leave a residue, so youāll probably need to use IPA afterward. Ā The leather should have a dull, matte finish after this step.
2) Use shoe polish to both darken the leather and to simulate dirt and grime. Ā Shoe polish comes in a variety of colors. Ā I used black, but what color you use depends on the leather. Ā Again, I rubbed this on with a paper towel. Ā I focused more around seams and areas that might accumulate dirt with use. Ā I also made random speckles and streaks. Ā Be careful not to buff the leather too much, since this will make it shiny again.
3) Lastly, apply a leather conditioner. Ā I used Pecardās leather dressing, but there are a variety of different types out there. Ā This serves three purposes. Ā It moisturizes the leather again, since IPA/acetone dry it out, extending the lifetime. Ā It tends to darken the color slightly, and it also keeps the shoe polish from rubbing off. Ā Wipe on a thin coat, being careful not to buff too much if you donāt want a shiny finish. Ā It takes a while for the conditioner to dry, maybe an hour or two. Ā If, after that, itās still feels kind of oily, you can wipe off the excess conditioner with a rag or paper towel.
And youāre done! Ā You may want to repeat some of the above steps if youāre not completely satisfied, or itās still too shiny. Ā Iāve also heard of people using sandpaper to scratch up the surface, but this damages the leather and didnāt quite give the appearance I wanted for my project.