I have a 2000 Honda Civic with 130,000 miles that is mechanically in good shape. Sadly, the previous owner neglected the paint and after several Chicago winters I have a few rust spots on one door. Is there anyway I can stop or slow down the rust? I was thinking about getting some Rustoleum Prevent Rust spray bottles but fear the damage is already done. I know rust spreads and after this brutal winter it has.