HNLim wrote: ↑
Fri Oct 05, 2018 2:08 am
The first thing that I did was to leave all the strings on and to sand down the edges of the guitar top here the pirfling are surrounding the bridge. I use a #100 grit sandpaper. I keep playing and keep sanding the edges and slowly sand towards the bridge. With the finishing on, you can see clearly how much material you have taken off. For the GC70 I sanded off more towards the treble and bottom area and lesser at the bass area. You have to do it slowly over many days, each time removing a little and them play on the guitar. When that is almost done, I proceeds to remove all the top finish with dinner grit sandpaper until it gets very smooth. At this stage, I remove the strings and work on the area between the bridge and soundhole.
I put the strings back on and have been enjoying the guitar very much now. The top is now raw and I am very reluctant to put on any finish for fear of changing the sound that I love. I may just put very light layers of shellac to give it the stain and finish off with one or two very light coat of lacquer.
Thanks for sharing your procedure of post-custom voicing of the GC70 à la HNLim
Since no two guitars would have the same voice (due to their unique wood's density and stiffness, and other factors), I am afraid if this process is to repeat on another GC70, it will be uniquely different!
Perhaps the legendary luthiers back then would have done the same kind of post-voicing, i.e. thinning out the top on their finished guitar (as there is no way to go back working on the underside), to perfect their desirable sound?