your doing too heavy of coats that why it drips. when i painted the inside of my case i did about 20 coats. thats because i went over it lightly. only used 1 can of paint to. also what type of paint are you using? dont use any of that stuff from home depot or stuff go to a auto shop and buy car paint. doesnt crack and turns out a lot better. and when you waz it you get a nice wax job