I think the Singer method is by far the cleanest way to wrap tape, even without shellac. It allows one to replace just the top section of tape when it gets dirty, it requires no electrical tape or twine, and the tape does not curl.
I wrote this description of how I do my tape Singer-style:
http://velo-orange.blogspot.com/
Chris
Chris Kulczycki
Velo Orange
109 Colonial Avenue
Annapolis, MD 21401