Ha ha enjoy your youth!!! it sucks getting older you get stiff and you can't move your arms and legs and neck the way you want to. in the trunk I painted the shop line PPG I used basecoat clearcoat. I am going to Base coat clear coat the door jams, the fire wall, engine bay and the whole outside of the car. on the inside of the car i used a shop line single stage with a Hardner and thinner. It's called urethane, even on the floor. I am going to spray under the car with the same thing but I am going to clear the single stage with the Hardner and thinner. I am going to use the off brand PPG Shopline 620 clear. You can use it on the base coat clear and the single stage urethane.