if it was my link that didnt work then here is copy and paste of what it said....
Spray the colors you want with Tamiya PS on the inside. Then mask everything that has to be shiny on the outside and spray PS-55 on it.
there is also a picture of his scooby painted that way i will try to paste the picture onto here or send the link, i dont know if it will work though
http://i50.photobucket.com/albums/f311/RobF353/Bodies/P1010053-1.jpg