I have used the following for flow coating exhaust / headers. I had the muffler shells on our '21 Cadillac coated to make them last as NOS mufflers are hard to find. http://www.hpcoatings.com/products/corrosion.aspx NFI. 1960 TR3a, TS78563 o --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.