While I had the bike in the shop (for too long!) I decided to acquire some vinyl sticker material to see what I could do about recreating the sticker graphics that have been falling off the bike.
The first step I took was tracing out the graphics in their current state:
Unwrapped, this provides a pretty good target to aim for and take measurements
Then I went through the vinyl that I have to try and match the colors of the graphics and paint:
Blue for the frame color
Oranges for the darker sticker graphics
Yellow, orange and red for the lighter sticker graphics
I also have black vinyl for the background.
This all feeds back to 3D Printing (surprise, surprise). Now that I have measurements for the templates that I want to trace, I can 3D print stencils and cut the patterns with a knife.
Once I have the cut patterns, I can use transfer paper to lay out the pieces correctly, then apply them to the bike.