yeah use engine enamel. like u could use regular spray paint for the engine cover but if you want to do all the others to match ull need to heat resistant
i did the cover on my VS by just cleaning it but on our VT when i cleaned the cover it left silicone on it and it kept bubbling so i had to do heats of light coats and rub it down until i got rid of all the bubbles but you could aways just use prepsol but i think it may be expensive
so just give it a wash n see how it goes