my kitchen sink had lost its shine

so i decided to try the 'bicarb' on it, the abrasiveness got rid of the dullness really well....but now i have streaky bits on my nice shiny sink *sob*
i swilled it really well with warm water and rubbed it really hard with a dry cloth but its still got white marks on it
anyone know how to get rid of the marks?
i'll be a very happy Shazzles if i can get it gleaming


