Would a 50/50 mix of vinegar and water neutralize the acids? That's what it takes to neutralize metal after a soda blast.

Or acetone/Eastwood Pre?

I don't think baking soda and water would work if the surface was going to be primed or painted. Baking soda residue won't let the primer stick to the surface. At least that's the case with soda blasting - all the soda must be neutralized.