Nathan: If the pitting is not structurally a problem or in danger of creating a perforation, you might consider just removing the rust with something like citric acid or a phosphoric acid based rust remover (found at automotive shops). If the pitting isn't deep, try just grinding them out and leaving as is. If you must weld, you can use 308SS filler. If the pasta cooker is low carbon 304SS, you should not sensitize when welding. Hope this helps! David Hendrix The Hendrix Group Inc.