Started sanding the back and sides today, hopefully I'll be able to pick up some goof off and a wire brush tonight or tomorrow.
45 minutes of light-ish pressure with 180 grit produced this result:
Needs more, right, especially on the sides? Or are the horizontal (sanding?) marks visible in the second picture going to come out at 240?
Supervisor Karl is not impressed with my lack of knowledge.
EDIT: I just read that basswood fibres can "stand up" or "stick out" after being wiped down with a damp cloth, is that what's causing those lines to look so prominent?