We have worked in several food service locations who have painted their ceiling tiles in the back of the house.  We do not recommend painting ceiling tiles. Ceiling tiles are treated with a fire retardant and painting the tile can lower the flame-retardant ability of that tile. It can also void the warranty and lastly, painting tile can also ruin the noise reduction ability of the tile.

Porous ceiling tiles commonly referred to as absorbent ceiling tiles, perforated ceiling tiles or acoustic ceiling tiles, are designed to enhance sound control in indoor spaces. These tiles have small holes also known as perforations, which enable them to absorb sound waves and reduce noise levels in an environment effectively.

Non-Porous ceiling tiles commonly referred to as non-absorbent ceiling tiles.  These tiles don't absorb water or any other type of liquid.

Putting inexperienced employees who may also be afraid of heights on a ladder to clean ceiling tile can create a recipe for disaster.

Air quality is a measurement of how clean vs. polluted the air is in an environment.  Cleaning your ceiling tile can improve indoor air quality on both porous and non-porous surfaces. There is a direct correlation between indoor air quality (IAQ) and employee health. Having an effective ceiling tile cleaning program can reduce respiratory concerns, allergies, and asthma.