> You have to scratch the paint to search each layer and people don't want to do that. So you scratch the bottom, and patch it if you really care that much. >

> You have to scratch the paint to search each layer and people don't want to do that. So you scratch the bottom, and patch it if you really care that much. > You also can't offer to visit someone for free and do a quick test since each test costs you money A fancy x-ray whizzbang that hasn't been developed yet costs money, too. And so does a technician to run it. This seems like a very silly solution looking for a problem.