I make a little video but sorry for the bad quality.
http://www.youtube.com/watch?v=OyRYD9OjUUU
Steps:
1 you cut your line
2 you pass with my point in the two sens into the line. you must have a inclination of your tool, +- 35 to 45° angle
3 you put the gold wire
4 you polish
I hope it will be easier for you