I usually use Black Beauty on most everything. If I see it's overly aggressive (if that's really possible) I'd blend in some of the glass bead I keep on hand. Or even better - blend in some of the used B.B. to take the edge off the new . But this will add time to the job too. 8-(

Perhaps back away - increase the distance from the tip to the work piece? And work on an angle with lower PSI?
Just thinking out loud.. LOL.