pretty simple. i just had some of this vinyl below from ebay that was left over so I used it. I just matched the angle of the "W" and I cut strips of each color.
Spray the surface with windex when you stick it on so you can move it around to line it up. Wipe away excess windex and it will stick when it dries up.
Took me about 10 minutes to do. I actually might redo it coz the red stripe on the right - the bottom you can notice that I did not cut it straight LOL.
Link to vinyl stickers and a better pic of visor.
http://www.ebay.com/itm/221878774193...&sojTags=bu=bu