I hear soda blasting only removes paint, no rust.
Walnut shell blasting is the "approved" method of blasting internal engine parts, but won't remove much rust.
I worked on an aluminum V-16 that had everything bead blasted by the shop that rebuilt it a few years ago.
With the engine partly disassembled for some repair work I found glass beads stuck in all sorts of places. looks like it is only a matter of time before the engine fails, probably by wiping out the Babbitt bearings due to the glass beads. It's a shame, by glass beading the engine parts someone has just about ruined a rare and expensive early aluminum engine.
Let me repeat, I would never sand or bead blast internal parts of any mechanical assembly.
Grigg
