Paint shop floor grids are generally cleaned outside of production hours using push along floor cleaners which contain the water & debris. Hand held jetting guns are used to clean smaller, intricate areas.
To clean dollies & skids on-line, without disrupting production, water jet nozzles can be attached to robots for automatic cleaning. Frequency of cleaning, type of paint etc. will determine what pressure is used, but typically between 900-2750bar.
Water jetting can also be used to strip paint from jigs & hangers used in any paint shop.