I'm a slick finish leather furniture-aholic! All of my furniture is leather and all of it has that slick finish on it. No matter what happens, no matter what dog gets on it, and no matter what they do while they're on it (furless kids included) it wipes right up and it's good as new! If you don't clip the dogs nails, and if they dig, eventually they'll leave nail marks in the leather, but if you clip the nails regularly, you shouldn't have that problem. My couch is now over 15 yrs old and looks like it was bought yesterday. I have a recliner along with a chair and ottoman that my mom has had for the past 10 yrs and passed them on to me a few years ago. All of which look just like they did when they arrived. That with 6 dogs and 1 - 5 year old little boy that abuse that thing on a daily basis.
Clorox wipes work wonderfully for cleaning spills on the leather furniture.
NEVER EVER EVER use nail polish remover NEAR leather furniture. heheheh