Bosch, 3m and Festool make wet sanding disks in 1500 and 2000 grit. These must be used wet with water, mineral spirits or naptha. They work well on urethane/lpu, lacquer and enamel paints. These will work on any finish softer than granite. This would be the preferred way to mechanically dull the finish. It abrades away very little of the finish. Chemical flateners may soften the finish for some period of time.

Otherwise, try using steel 0000 wool rotated 90 degrees from the direction you buff, use a paste furniture wax while you do this. Don't swirl while you do this. Pull and push only in one direction. After you are done, take some mineral spirits on a rag and wipe off the wax, also ammonia and water will remove the wax too. The paste wax acts like a lubricant and you are less likely to go through the finish, it also makes for finer scratches with the wool. If this leaves too course a finish get the wet sanding pads I mentioned above.

I have used both methods to take gloss finishes to matt in lacquer, shellac, enamel and urethane restoring damaged antiques to a matt finish after repairs were completed.