Ah, i never posted the results. Well i had this problem on my city 2007. Not sure if this is available locally or maybe something similar is available here. I was told that there are conductive markers available here, they are markers and using this marker u can make corrections to yr defogger lines. The line drawn from these markers is conductive (current can pass through) and these are normally used to in electronic circuits. I am sure these markers are available here.
Regarding the kit, i did use it and was able to fix around 4 lines, though the width of lines after application was a bit more than original width. The process is difficult since there is not much space to work on back window, i was only able to fix the top 4 lines. Rest of them were not easily accessible and the process demands very careful application.
Also see this: http://www.lawsonproducts.com/lawson/Defroster-Grid-Repair-Pen/P68551.lp