Here is the car after I painted the interior and the trunk. I sprayed most of the interior including the floorboards, firewall and rockers. I used a Sears 3HP compressor (5HP would be better) set at 45Lb's and a Campbell Hausfeld PH7110 Professional spray gun. I made a large "tent" inside the garage out of plastic drop sheets covering the walls and ceiling. The plastic keeps the dirt from falling on the paint and "attracts" the overspray away from the car. The worst part of painting a car in your garage is dust control. But by using the plastic and wetting down the floor with water, I kept the dust down long enough for the paint to dry.