Buttplate blued or colored?

[Jerry Andrews]

I bought a really decent underlever hammer Parker. Yes, thanks guys for getting me into these but man the quality of these old guns is just so outstanding! Anyway, it's been recolored, very nice job, rebrowned, very bad job, as I think it should have been redone to bring out the colors such as what Brad B did on Mark O's guns. The buttplate however was recolored also. Needless to say it's steel. Should this plate have been blued or would it have been case colored? This gun was tightened up by someone who did an outstanding job on the metal works. Just wondered about this plate. Jerry