Recipe: Mix 1/2 water and 1/2 white vinegar - add fabric and saturate.
Remove fabric and leave wet.
Place the rusted metal on top of fabric or the fabric over rusted objects or do both - I use a plastic container to hold the items.
When the fabric has rusted to your taste, place the fabric in salt water and soak for about an hour.
Remove the fabric from the salt water and let air dry.
After the fabric has dried, launder in mild detergent.
There you have it - now you too can rust away.