A LensRentals blogpost titled "How to Ruin Your (or Our) Gear in 5 Minutes" says that the color gets everywhere:
The color dust is very fine, tiny specs, made to stick on people as they run by. Because of this, the lenses’ weather sealing, front filters, etc. don’t even slow this stuff down. It’s throughout the entire lens stuck on every element, on the gears and helicoids, and in the mirror box of the camera too. And yes, that includes pro-level lenses on pro-level cameras, all of which are supposedly weather sealed.
If I want to take pictures of something like this, how can I protect the camera?
Would it be sufficient to wrap the camera in a plastic bag? Or would you need the kind of waterproof housing made for underwater photography?
Is anyone willing to share their experience?