I love the look produced from pickling wood with steel wool and vinegar. See this example for details.
I am hesitating to actually do this on a raw ready-to-finish table because I fear the steel wool/vinegar product actually harms and deteriorates the wood faster. Does anyone know if this is true? Or does it truly just change the color to somewhat more silverish? Does it even matter after I apply a coat of polyurethane to the pickled table?