Yikes, that’s a tough challenge! Removing house paint from your car without damaging the vehicle can be difficult without professional help.
One way to remove the paint is to use rubbing alcohol. Protect the clear coat around the damage with painter’s tape, and apply rubbing alcohol to the paint splatter. Use a clean towel to rub the rubbing alcohol onto the paint. Then, apply an oil-based cleaner to the splatters. Finally, use a clay bar to remove any extra splatter and wash the area with soap and water to remove the chemicals.
For the easiest, least risky repair, bring the car to a body shop. They will have a special solvent that will remove the house paint without damaging the car paint.