Is it customary for Deacon and Subdeacon to say Vesting Prayers? A correspondent points me to Ceremonies of High Mass (Dublin 1843) which advises that each minister "may use the prayers to be said by a bishop".
Indeed, why not? the prayers for the Dalmatic and Tunicle are already provided among the prayers to be said by a bishop when vesting, and I suspect they are of some antiquity because they express the first-millennium idea that these vestments are signs of joy (which is why during penitential seasons they are replaced by folded chasubles - find my treatment of that via the Archive facility). Oh yes ... and can I ask ... am I the only person who puts the Maniple on after the Dalmatic for fear that otherwise my left arm will get helplessly entangled? Is that one reason why the book referred to above advises that "The deacon is to kiss the maniple in due order of vestments but he does not take the maniple until the celebrant is entirely vested".
Come to think of it, the Maniple Prayer doesn't go particularly well with the Dalmatic Prayer.
At the request of a colleague at Lancing, I once composed a rather nice Latin prayer to be said while putting on the radio microphone. Sadly, I can't now find a copy ...
While we're on Vesting Prayers ... I've always envied pontiffs the prayer said while taking off the Cappa: Undress me, O Lord, of the Old Man with his morals and activities ... There ought to be another prayer (I hope someone would like to compose one in Latin) for the pontiff to say, after Mass, as he again puts back on the Old Adam and goes back to his ordinary everyday life of murdering, fornicating, and embezzling.