Thank's for the pictures James, I wish you best of luck with further restoration. And remember, a guitar is only as good as it sounds, looks come secondJames A. Showalter wrote: ↑Sat Apr 07, 2018 12:19 amrsz_ryoji-san.jpg
This is my 1972 Ryoji Matsuoka that I repaired the sound board on. It's still not pretty but it is structurally sound now and still plays well. It has a deep tone and is easy to play. I'll probably readdress the finish with another application of water sanding with 600-grit and another coat of Royal Lac finish the next time I change strings.
The large blemish below the sound hole was a deep gouge where the previous owner planted his pinky while playing. He ate up a bit of the cedar top with his fingernail and there was a crack due to grain separation through its middle. The other wide blemishes are grain separation cracks and the sound board had curled up parallel to each of them. When I filled each of these with the expanding glue and sanded it the curled wood was in some areas removed with the excess glue by the flattening process resulting in the medium blemishes. There were other thinner separation cracks as well that did not exhibit the curling of the sound board. These filled with the glue and sanded flat nicely and can be seen as linear features on the sound board.
I tried to rotate the photo but had no luck.