Go and buy some wax and grease remover, clean whatever it is your painting, then if you want to go this step, spray some plactic paint adhesion spray on it. Works a treat!
Theres vinyl colour dye, and theres plastic and vinyl paint.
I've used both, and there both really good, i put the dye on my door trims, and they came up a treat! I painted my console with the paint, and still looks great!
You just gotta do the prep work first!