So sorry to hear about what happened. I can really understand what you are feeling. Goo Gone Latex Paint Cleaner may work for you. I've not used it for this purpose. You can research it more and then try it on a small test area first. I would think using something like a bug and tar remover sponge with it would help.

https://www.homedepot.com/p/Goo-Gone...2192/300152295