Cleaning condenser coils on BC X-12R, X-14, X-14R and X-15R

These centrifuges have a lattice of punched 1/2" holes to allow the condenser to breathe/cool. To clean these, we've been hauling the entire centrifuge into our workshop, removing the back, and blowing it out with 90lb compressed air. Does anyone have any better ideas? Is there a brush that works well to fit through a hole and disturb the dust so it can be sucked up with a vacuum? The sheet metal itself cannot be easily removed. Nothing really seems to fit through the holes except for the dust. Has anyone tried an aerosol coil cleaner such as Nu-Calgon 4171-75? I know this is intended for evaporators, but I have used it at home to clean my refrigerator condenser coil as no tool yet created by man can reach inside of it. It's worked well there. Anyone have any thoughts?

Equipment: Beckman Coulter X-12R, X-14, X-14R and X-15R benchtop centrifuges