what the title says
Who paints a gas mask? Half the world's paints will flake off flexible rubber and the other half will corrode it.
I feel like this would make it easy to shoot you in the face. Like those goofy red sun glasses.
If it would be a camo "paint" like some real ones, russians and israelis seems to have a model with camo, then why not, but if OP means something like those colorful and goofy skins cs:go has then no thank you.