foxbrookdtl ---
I have not had the pleasure of removing paint from a soft black top yet, but
since you have done other vehicles with this same paint from the same place, did you determine if this overspray was water based paint, epoxy, or what?
I think next you need to determine what cleaner you used before to remove said paint from the other vehicles will do to a dyed black cloth top, and go from there.
If I had to do this today, I would probably try the least invasive method first that I have - steam and a mild apc to see if that would loosen it from the fibers, and then get my extractor out and inject hot water into the top and extract it out and see what it looks like.
If this did not even move it, I might then try to use the thinner for that type of paint on a Qtip at a place that is the least noticeable, checking for color transfer, and if none, try the same arrangement on the smallest spot of paint and observe and blot quickly. You dont want anything that is going to have reaction to bleed through to the headliner inside the vehicle..
Use the extractor frequently to pull out what you are doing so it doesnt soak in below..
If all fails, my go-to product has always been Goof Off professional, sold at auto body paint stores of Home Depot/Lowes, paint depts, in that little metal yellow can.. Qtips are your friend here too. Test, make sure it doesnt remove color, work quickly, try not to smear the paint, extract, blot, etc.,
Good luck! Wow talk about challenges !
Dan F