I think my succulent could have a problem

[tingz]

I'm brand new to the forum and to succulents. I got this little guy about a week ago along with a couple others. Wanted to put them in a bigger pot but noticed some grey-ish spots on a few of the leaves on this little guy. It doesn't seem to be on any of the other plants or any of the other stalks of this one. Is it a problem? Do I need to keep it away from the other plants? Another pot or whole separate room? Thank you in advance for any advice you may have.

[ReptileAddiction]

Can you scrape it off?

[tingz]

Sort of. They were stuck on there pretty good. I read somewhere to use Windex on a Q-tip and then wash 'em off. Tried that and got most of it off I think. I may have damaged/bruised (?) some of the leaves in the process and picked off a couple that were really bad. The few leaves on that stalk have gone a dark green and lost their luster where the rest of the stalks look ok. Not real sure what to do at this point.