Body prep before paint?
I tried the search function, but came up with waaaay more info than I could read through... Sorry if this has been discussed before.
But my question is: Is there a specific method to prep a body before paint? I know I should wash it with dish soap, but is there any type of sanding, or adhesion promoters I should apply?
Reason I ask is, I just painted a body (single colour, no graphics) using Tamiya Color paint. Guy at my LHS says just to spray it on, and it'll adhere. Well, it did not adhere very well. Took the car out once, and it's all peeling off.
I cleaned the body thoroughly, so I'm curious what went wrong? Any suggestions?