I use epoxy putty, break all branches or plates away mix it up and place on encrusting area. You don't have to be super firm, just give it a good cover, after a few days you can peel it back, chip it away or leave it. Orange polyp green body digi, orange cap, peltiformis, purple digi, have all become borderline pests in my tank.
I could also give you some Hydnophora, just drop a chunk of that on any coral and bye-bye.