Yes, but it won’t stack with the enhancement bonus for masterwork, if it’s a weapon. Incidentally, these bonuses do stack on at least some skill enhancement items, like musical instruments, because they give different bonuses (“circumstance” and “competence”, IIRC).
Would the +4 also go to the attack roll not just the damage roll?
Yes, but it won’t stack with the enhancement bonus for masterwork, if it’s a weapon. Incidentally, these bonuses do stack on at least some skill enhancement items, like musical instruments, because they give different bonuses (“circumstance” and “competence”, IIRC).
Right, but the masterwork enhancement is just +1.
For instruments it’s +2.