DO IT WITH NAIL POLISH REMOVER
As a teacher I have gotten marker on just about anything it was possible to get marker on and never have been able to get marker out of leather. You could try a shoe maker to see if he has something to remove it or go the store where you bought the couch and see if there is something that will remove it.
get a cloth and soak it with gasoline
By purchasing a car with cloth seats.
I have used Axe cologne spray and it has worked really well.
Cleaning leather bus seats is best started by thoroughly vacuuming the seat, being sure to get into all seams and crevasses. The safest thing to use to clean the seats after vacuuming is a leather cleaner from a reputable manufacturer. There are many suggestions for using household cleaning products on leather seats but these often remove the finish on the leather or simply spread the dirt around.
Pilot seats DO have leather. Frequently, they are added as an upgrade.
Try Isopropyl (rubbing) alcohol. Not just for hair... I don't know if this works on leather or not, but I've used hairspray to remove permanent black marker from a crushed velvet sofa. (I wonder if it's the alcohol in it?)
Not all car seats are leather. Some people just prefer it, and get it as an option.
Warm soapy water and a soft cloth. Soap will break up the grease. Apply leather conditioner after throughly dry.
usually their are in vinyl . but some time they put leather seats on their cvo models.
Leather seats are increasingly slippery after they have been polished. To avoid slipperiness, cease polishing your leather seats.
It can