What I have done in the past to get rid of trash polyps and button polyps that get out of control is to mix up kalk powder ( I use Mrs. Wages Pickling Lime) into a paste.
I use 5-6 tablespoons to a couple teaspoons of tap water and nuke it for 30-40 seconds. You may have to adjust the individual amounts accordingly to get a paste.
Turn off all flow in the tank. Return pump and powerheads.
I use a plastic 5 mil syringe without any tip on it and use it to carefully spread the kalk paste over a small section of the polyps you want gone. Be very careful to not get it on any coral. Make sure there isn't a prized coral directly below a area you are using this on.
Leave it on for 20-25 minutes. ( I've even shut the lights off to force the fish to take cover so they don't stir up the water).
Then I use a suction hose ( my python hose) to remove all of the kalk paste from the area. Some of the polyps will have dissolved and you want that material to go out too.
I usually do this on a water change day so I can really suction off the area.
I've had some of the kalk paste float into the water column, but really haven't seen any lasting damage.
Don't try and do too much at one time. Keep it to a small area and you should have reasonable success.
I've done this with several different types of polyps and even mushrooms.