Leather - cleaning with 'solvent'?
I have a near new couch that is a good quality leather, and somehow something, I know not what, go on to two cushions. It is just on the seam bead, and at first looked like a leather failure, i.e., like I could see the rough, like the top finished surface had failed. It has a "splash" look.
I have no idea what it is, I'm almost sure it wasn't delivered that way.
I tried to clean off with soap and water, even used the rough side of a kitchen sponge, didn't even "dent" the area. Then I carefully tried a cloth dampened with "goof off" or whatever the stuff is called that's supposed to even remove dry latex paint. Didn't do anything. Tried "Goop" hand cleaner, the stuff that mechanics use to clean greasy hands. It didn't work either. I'd like to try paint thinner, turpentine, or the like.
Suggestions, warnings welcome.