I am interested in insulating a 16' by 8' garage door. There have been some discusions here but not a lot of detail. I would like to use something that has a plastic or vinyl backing facing into the interior of the garage which would reflect light and also be easy to keep clean. An internet search shows a product named Dura Core HP which looks promising. However, most of these type kits (same product different name?) are quite expensive at almost $300.00 to do my door. What have some of you used? Can the regular pink or blue foam insulations sold in 4' X 8' sheets be painted? Have any of you used the Dura Core product? Thanks!