If it hasn't been too long, paint thinner. Lacquer thinner will work faster, I don't know if it will damage the finish on the hardware...usually it's not an issue. Do I dare suggest you call the painter and have him come remove the stain?

I remember seeing a site or a blog where the homeowners had Fireslate and they could not remove the rings, or stains.

There was a thing on Pinterest a while back talking about how to get out oil stains from clothes that had already been washed and dried. You put cardboard under the stain (so nothing would bleed through), and then you sprayed WD-40 just on the stain to 'reactivate the oil". You then followed that by applying lots of baking powder and pressing/brushing it in, letting it soak up the oil, dust off/repeat. Finally, glob on the blue dawn, rub it in, and rewash. I tried it on a few shirts and it actually worked. It was time/labor intensive, but I saved a t-shirt I really liked that I thought was done for. If interested in all the details, you should be able to search for 'wd-40 baking powder dawn' and get several results.

Thank you both for the suggestion to sand. That was my "if all else fails" option and I guess that's where I'm at. I started sanding, some areas came off easier than others, but then my sander broke :-( It was old so time for a new and better one anyway.