would a plasterer invited to quote for an already pboarded out job, expect to supply and fix his own corner beads, scrim all the joints etc as part of his esteemed quote?
put another way - would the person employed to supply & fit the pboards (but not skim them) realistically want to be involved in supplying & fitting corner beads, scrim etc - as (at least in part) they are critical to the final finish....
I foresee potential for a load of "not me was him" finger point/ blaming bullshit here....
Jim K