General Rustoleum paint
Hand-rollering or brushing bodywork with Rustoleum Combicolour
Painting chassis parts with Rustoleum Combi
Steveo3002: Please don't use Hammerite, there's better stuff available with little effort taken to find it.
I have done some of my VW Golf parts with Rustoleum Combi paint, here are a few pictures of the results.
Vactan is a rust-treatment inhibitor often used by the Rustoleum persuasion
i.e. search the Wiki on Vactan