A customer called me today regarding his wifes Mercedes stained leather. He said she spilled some kind of oil (maybe olive oil) on the rear seats and asked if I had something to get the stain out. Im sure the stain has been sitting for a long time already. Now I would think using a strong leather cleaner would do the trick but I feel it might not work to get the full stain out. Any tips on a thick oil based stain in leather? I have both LM strong cleaner and the Rapid S cleaner which should work well but it may not be enough.