It's tempting as hell to do a quick-clean, check the clearences and fire it up. There is so much potential to miss sand and other contaminants, I'm leaning toward tank cleaning (chemical stripping). You then can seal the inside with an industrial enamel or epoxy, made for that purpose. Have you guys who "bead blasted" been able to get everything cleaned out?
Hotater: are you the next beta tester? Can't wait to hear your impressions, thanks.