I'm wanting to spray the chrome trim on my tailgate to match the colour of my car (colour code is apparently NH-674M - though I will confirm this). As I've never sprayed anything before, I was wondering - How would I need to prepare the trim piece ? Would I need primer before the paint ? If so, would it be any particular primer, or would basic Halfords grey primer be Ok ? Where is the best place to get the correct colour paint in an aerosol can ? Once it's sprayed, and dried, do I need to treat it with anything else ? As I said, I've never done this before, hence what may seem like noob questions, but I'd like to give it a go myself, and I think it's something I could do on my own.