Removing Overspray???
http://www.detailedimage.com/Clay-Ma...-Clay-Bar-P42/
I would try Polishing Compound. It comes in a round can like Rubbing Compound but has a much finer grit. If the car has been sitting outside for a long time the paint is probably pretty oxidized and you'll have to take off some paint to get the color back.
Lacquer thinner? Yes, if you plan to repaint immediately.
Mine was only a light overspray and the clay removed the surface "roughness" which I then followed up with a Farecla G3 compound to get the paint finish back. Then Sealant.
Good luck!



