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At 08:39 AM 3/11/97 +0100, you wrote: >>Hanno Spoelstra wrote: >>The exhausts/mufflers I have used until now all burn off the paint after a >>short time and start to rust. I think that to make an exhaust/muffler last >>longer, it helps to apply a more durable finish, such as: > Isn't it so that mostly the muffler rusts from the inside out due to >the condensation of water inside the muffler. Although I see that my >muffler has two beginning holes at the left side and the right, right >where the tires spray water on it. >Bart Mertens The high temp of the exhaust gases burn off the paint, this leaves the metal unprotected. It will therefore start to oxidize (rust), both inside and out. The exhaust emissions also contribute to a corrosive environment. It depends on the conditions who wins, the rust from the outside or the rust from the inside, but eventually they will meet. One cannot completely stop the process, but I want to slow it down as much as possible. Hanno Spoelstra <H.L.Spoelstra@WbMt.TUDelft.NL> Bloemendaal, The Netherlands