[redmodelt]

To get our block really clean we have them acid cleaned at a place that does metal stripping, bodies etc., cleans the rust out of the passages, but Babbitt has to be removed.

If the Babbitt is still good we hot tank the blocks without removing the Babbitt, our shop that does the work can lower the block into the tank and leave the Babbitt above the solution. Hot tanking is good for general cleaning but does not remove rust.