I used a gloss high temp spray can to do the engine and that came out really good, just takes foccing forever to mask everything off. For the downpipes i used a matt black high temp spray. It all looks original still so im happy.
ahhh, that'll teach me to read properly before aswering. I did youch up the horizontal bit of frame by the oil filter with the same spray paint used for the engine. That remind me i still havent sanded the edges fo the fins.