I’ve used CO2 blasting for decontamination contaminated circuit cards and other sensetive electronics, and it works pretty well. By adjusting the pellet size in the CO2 gun you can affect the aggressiveness of the cleaning. I have found that it will easily rip off any foam that is present, such as thermal pads or shock absorbers. For dense liquids such as thermal paste it tends to push the material around.
Its very useful when cleaning items that are contaminated with flammable liquids since the CO2 supresses combustion.
