If you look at the archived 2006 website, your GO 170 is either FAST (GO) technology or TufSkin (ASA).
It may say somewhere on your board, bit either way, use epoxy resin or epoxy based filler to repair your
Here's a link that explains the different layers in each "technology" for the 2006 boards.
While on the 2006 archive, you can find your board under "Products/Go
Hope this helps,