On the crucifix (or medal of Blessed Miguel if you have one attached) say:
Before your death you told your friend to ask you for favors when you were in heaven. Dear Blessed Miguel, I beg you to intercede for me. In union with Our Lady and all the angels and saints, please ask Our Lord to grant my petition, provided that it b e the will of God. (Here mention your request.)

On the white beads that symbolize his purity:
We honor and adore the triune God. Glory Be.
We ask the Holy Spirit for guidance. Come, Holy Ghost.
We pray Jesus taught us to pray. Our Father.
We venerate with love the Virgin Mary. Hail Mary
All you angels, bless you the Lord forever.
Saint Joseph, Saint (name of your patron) and all the saints, pray for us.

On the read beads that symbolize his martyrdom:
Blessed Miguel, high-spirited youth, pray for us. Viva Cristo Rey.
Blessed Miguel, loving son and brother, pray for us. Viva Cristo Rey.
Blessed Miguel, patient novice, pray for us. Viva Cristo Rey.
Blessed Miguel, exile from your homeland, pray for us. Viva Cristo Rey.
Blessed Miguel, prayerful religious, pray for us. Viva Cristo Rey.
Blessed Miguel, sick and suffering, pray for us. Viva Cristo Rey.
Blessed Miguel, defender of workers, pray for us. Viva Cristo Rey.
Blessed Miguel, courageous priest in hiding, pray for us. Viva Cristo Rey.
Blessed Miguel, prisoner in jail, pray for us. Viva Cristo Rey.
Blessed Miguel, forgiver of persecutors, pray for us. Viva Cristo Rey.
Blessed Miguel, holy martyr, pray for us. Viva Cristo Rey.

Information taken from "My Treasury of Chaplets" by Patricia S. Quintiliani