yes caustic solutions will remove anodize ,it will also damage the aluminium , the extent of the damage depends on the strentgh of the solution and the time it was left on the part . you have diffrent ways of fixing it . you can polish the cases (yes they need either a protection or you will have to repolish them )
you can also glassbead them and have them powdercoated a solid color or
polish them then powdercoat over the polishing with any candy top coat colors
