There is a composit material that many shops use,the negative is the price,way to high in my bok,iv done a loot of interiors and always used oil harden masonite it dosnt distort and can stand both cold and hot weather,but do not forget to put plastic behinde the masonite or you will get a problem,done a number of interiors where the previast owner has taken of the plastic and the door panels look like pikes pik,no bueno
