This is the guitar cake I made for a graduation.
http://cakesdecor.com/cakes/18711
I ran short of time on my cake so the neck of the guitar is actually foam core covered with fondant/gumpaste. The strings are light guaged wire, and the part where the strings connect to the top of the neck were connected with push pins. (I just instructed the customer that there were push pins)
If you go to google, and search “Guitar Cake Tutorial”, there are a lot of hits.
http://www.youtube.com/watch?v=m0W2G2O5J74
I think this is the tutorial I followed when I made my cake. Mine was full sized. The mother of the young man who was to receive the cake was able to sneak the guitar out of the house. I made a full size pattern tracing the guitar onto freezer paper.
Good Luck with your cake!
Psalm 127:1 Unless the LORD builds the house, the builders labor in vain.
