Exposure to large quantity of asbestos dust
Spraying was often used as a method of application for asbestos when insulating steel beams and structures and bulkheads on ships. A machine was commonly used to mix asbestos with water to make a wet mixture that was sprayed through a large hose.
The spray did not always stick on, with much of the spray mixture bouncing off onto the floor and into the air. Sprayers have usually been exposed to very large quantities of asbestos dust as a result.