An ML4 is another lathe with plain bearings, and without seals for the bearings, so given its age, not really suitable for high speed, nor able to keep out dust..
You will already be aware that some woods, the dust is corrosive, so the machine should be kept scrupulously clean.
Although that goes for all of us, whether working with wood or metal!
Restoring the Drummond to working order would be a useful and informative project.
Howard