Later generations did little to improve the property. Sir Robert Henry Cunliffe, 4th Baronet (1785–1859), stuccoed the walls of the house, while Sir Robert Alfred Cunliffe (1839–1905), faced it with stone in such a way that the house seemed to be of three different styles - none matching the other. After the death of Sir Foster Cunliffe, 6th Baronet (1875–1916) in World War I, the estate was bought in 1917 by Sir Bernard Oppenheimer. The Denbighshire Hussars were billeted in the house and grounds at that time. Oppenheimer opened a diamond cutting training school and workshop in the grounds of Acton Park. The scheme was designed to ensure jobs for ex-servicemen. It was the 'Homes Fit For Heroes' ethos in action, but Sir Bernard's death in 1921 led to the workshop closing.