After I got out of the service and moved to New Orleans, my first job was at Avondale shipyards. I operated a high pressure hose in the holds of barges in a full Hazmat suit spraying off the contents stuck on the walls. You could last about 20 minutes and then had to come up for clean air and cooling. I lasted 1 week. Hardest thing I ever did. I am kind of glad I bailed because what was considered protection in 1969 would probably not fly nowadays.