heres what i do,
1.red oxide primer
2.color of paint you what in a oil base
3.quart of naptha or the amount that you will need to mix with the amount of paint you will be using!
4 linseed oil!
1 apply red primer
2 mix paint and naptha , 60% paint to 40% naptha and apply
i like to use a bush for the streaking effect,
3 let set outside in sun for about 14 to 30 days,
4 whipe in down with the linseed oil!
the naptha will cause the paint to fade and chaulk up quick
the linseed will remove the chaulk and give it a semi flat luster, apply as needed! dont have to if you like the way it comes out, also you can wet sand thru or buff thru in places like edges! down to the red primer! note: this will not give a rust look but a faded paint look,
match the color of the paint on ya car close the naptha will do the rest! or if ya do the whole car it will look like its been setting in the sun for years!