not sure on painting teg lights, but for the civic:

take off your bumper, unbolt the 4 bolts holding the headlights on, use a heat gun to heat up the caulk holding the 2 pieces together, slowly pry the pieces apart. Take out the middle crome piece(2 screws holding it onto lens), and paint. to put it back together to everything backwards, but use the heatgun to heat the caulk back up and then put the headlights back together.