I may have screwed up my YSL patent leather- NEED ADVICE

I've heard vaseline works.

I googled it:

"Restore the shine of the patent leather with petroleum jelly. Put about one tsp. of petroleum jelly on a clean, soft cloth. Use the cloth to apply the petroleum jelly to the surface of the leather. Be sure to thoroughly rub the jelly into the leather and do not apply additional amounts of petroleum jelly. Too much jelly will leave a residue that can attract dust and stain hosiery."

http://www.ehow.com/how_5841127_fix-patent-leather-shoes.html

I have not tried this myself so proceed with caution.

I'm wondering about the vaseline too. I remember my grandmother mentioning to use it for a few things - one was to clean patent leather but not sure if it will remove that coating.