Make sure to seal up everything
Just a note here on soda blasting the bottom... After having had that done last spring I can tell you to be absolutely certain that every hatch and port is thoughly sealed off. Overseal with plastic and tape if you can. Even plug the through hulls from the outside. Check that the contractor does this properly before they start blasting if you're not doing the job yourself. The fine particulate will find its way inside the boat and make a real mess if you're not meticulous about this, and the subsequent cleanup will be hellacious. (Don't ask me how I know.) Good luck - the results are a thing of beauty.