I deyellowed my Mac Portable's spacebar using this:
• 3% H2O2 (normal drug store kind)
• 1 teaspoon Oxiclean (boosts the H2O2 slightly)
• Small transparent plastic container.
• SaranWrap (as a cover to prevent evaporation)
• Aluminum Foil (place shiny side up, under the container)
• Two angled...