An easy way to effectively remove rust stains from clothing is to use a combination of salt and lemon juice. First, sprinkle some salt on the rust stain. Next, squeeze lemon juice over the salt. Finally, lay the clothing in the sun to dry.
This method is non-toxic and works best on colorfast clothing. Those who are worried about bleaching or fading their clothes can first test the method on an inconspicuous area before using it on the rust stain. If the rust stains remain after the treatment, repeat the steps or try a commercial rust remover, which can be found at most grocery stores.