G'day folks,
CarinaBob, there are clear spray coatings made, for use on polished alloy motorcycle engine parts, around that would work well on that flywheel.
Soda blasting sees a lot of use on alloy parts these days, as it's not as harsh as beads, and doesn't leave beads lodged in blind holes and crannies.
The piston aero engine rebuild industry still uses bead blasting, but there's a lot of meticulous after-blast handwork involved in ensuring that absolutely no beads remain in the components.
