I know that besides Sun, etc the heat from engine can damage exterior hood paint. I have just purchased the generic OE type kit kit (supermuscleparts.com). But, does not do much for the look of engine bay. There are many universal types of heat insulation & sound deadening adhesive backed material out there. From cheap to very expensive. Some come in rolls but, most are folded. A smooth reflective surface would be best. If I find something that gets good recommendations. Will likely use kit that I bought as a pattern for new material. Best to use?