Lanocote, from marine-hardware manufacturer Forespar, has been out for a while and is now available in a variety of sizes, including an 8-ounce pump-spray bottle. It's designed to prevent or inhibit corrosion on metals by forming a non-greasy moisture barrier on treated items. It also works on screw threads, allowing the screws to be later removed. The manufacturer says it can be used on electric panels, outboard motors, and fishing tackle.
$9, (949) 858-8820, www.forespar.com