You could apply copper leaf (using gold size and a gilder's tip) to the decals, then wait for the verdigris to kick in.
Why make life any easier than it is already?
@BringMeMyFix started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
You could apply copper leaf (using gold size and a gilder's tip) to the decals, then wait for the verdigris to kick in.
Why make life any easier than it is already?