Last weekend (May 25) the inside of the smokebox was needlescaled to remove the rust.
Unfortunately, because the stack was uncapped during the locomotive's tenure in Liberty Park, the bottom has rusted very badly. Not all the way through, but the smokebox is going to need some major repairs. This is not to be discouraging, however - all other aspects of the project are still on schedule. This issue will have to be taken care of when the boiler is sent to a contractor.