Why does a car always attract dust right after it is polished? (Note that car wax and car tires are insulators.)

The paint material contains some charges due to the chemical in it, so while in air the dust particles coming close to it also acquire opposite charges,and as electrostatic force decrease with increasing distance so attractive force is greater than repulsive force, hence there is a force that attracts the particles to the paint

So dust particles get attracted to the surface of newly painted cars because of this reason

Image A shows the correct way. You add vectors from the head of one (the arrow-tip) to the tail of another.