Well, basically all the parts that have had paint on them from factory can be re-done/painted. I painted the block with black engine paint before we fitted it and same goes for the silver head. But apart from them it's just one thing at a time. You can paint the engine fan shrouds if they are a bit tacky and the top of the radiator (you can tape it up properly which saves you removing it). Also get some wd40 onto your hoses to get them to shine up nice. Generally it's one thing at a time.
Good Luck buddy