Any of the companies that specialize in body work supplies (is Eastwood), sell various glues that work quite well for door skins and the like. I have also used a glue that I think I purchased at Home Depot that was about 1/4 of the cost of the Eastwood product and worked just as well. It was in the caulk isle , but the brand name escapes me (maybe P&L?), but it is clearly marked "metal glue", and forms a good bond and is waterproof. Used it on several antique car restorations with great results.