Chap who has rebuilt an F40 LM race car was less than impressed with their service, they coated his manifolds without first checking the tubes were clear, some foam packing balls had got inside and melted in the process, it was lucky he checked them before installing the manifold otherwise the molten remains would have blown through and straight into his brand new turbos, ok we all make mistakes but the company did not apologise and eventually just offered to clean and recoat the manifolds, when they came back once again a boroscope revealed most of the melted mess was still inside yet again!