Salt Removal Act
you will need the following
Old salty shoes
1 tbsp white wine vinegar
1 cup cold water
heavy duty paper towels
Step 1: Mix tablespoon vinegar with cup of cold water. Mix with a spoon. Dip cotton balls or paper towels in mixture and gently scrub salt off. The acid will break down the salt so you don't ruin the finish by over-scrubbing.
Step 2: Leather is skin, and skin is what your body is covered in. When you feel dry in the winter, you put lotion on. Using paper towels, smear the shoes in vegetable oil. Vegetable oil is going to basically hydrate the leather that has been drying out under all that salt. The oil will keep the leather pliable so it's not as likely to pull away from the sole. A real live cobbler once taught me this trick.
Step 3: You may want to repeat the oil step a few times. The leather will quickly absorb the oil. Now you just want to wait another six months until it's actually dry and clean enough out to wear these shoes again.