use it on your next frame Jeff (think "my new Thylacine frame should get treated") as the frame saver is not meant for already rusting frames unless you can get in there with some steel wool and a coat hanger and clean it out, spray it with a little WD40, dry wipe it (coat hanger and old t-shirt), and then give it a coat of Frame Saver. Without the cleaning process, ou are just sealing the rust in. Best to remove to prevent any further outbreaks.