Looks like a great first restoration project! +1 for trying the more gentle rust-removal techniques first (steel wool and WD40, then wet/dry sandpaper starting with 600-800 grit). Barbicide is the way to go for disinfection after you've removed all the rust you want. If you do use Barbicide, be sure to read the instructions for proper dilution and timing and DON'T expose the scales. Barbicide likes to devour organic and inorganic plastics alike. Good luck!