Retroflective adhesive vinyl is a wonderful thing.
FortunatelyMichael Mandiberg, artist, programmer, designer, educator, bicyclist, and creator of Bright Bike - recently released DIY Kits made available online [here]
The kits come in two types: Caterpillar and Pinstripes.
The Caterpillar has 1 inch bands that wrap around the main tubes, and in inch dashed lines along the fork and seat stays. The Pinstripe has 1/4 inch strips that run along the outside faces of all tubes.
Each kit is sized to be large enough for a 61cm frame with extra wide tubing, so in nearly every case, you will have extra materials that will give you room to play and experiment.