Help with disease Identification on Cactus

[ojgreeqnlyfe]

Hello,

I need help identifying a possible pest or disease on this cactus. I noticed the gray, pale spots this week.

It is in an indoor setting with a good amount of light. I have a few cactus's with scale bug in the house so it could be early stages of that? Any thoughts?

Thanks!

[baileysup]

That or just mineral deposits from water. Do you keep them outside, or do they get a water spritsczing? Pests are always possible, so keep eyes on her. Looks OK to me right now though.