I'm going to throw paint thinner on a neighbor's car because he keeps parking in front of my house.
Why do you want to vandalize your neighbor's car?
It will help me get my parking spot back.
I can understand your frustration, but it's very wrong to throw paint thinner on your neighbor's car and ruin it. If you are caught, you'll be arrested.
Unless he moves, I'm going to keep doing it on a regular basis until he stops.
This is not a smart thing.  Try to work something out with them for find a different parking spot.   It is not worth getting fined or arrested over a parking spot.