Dark Spots and Patches on Phalaenopsis Leaves: Disease or Something Else?

[fegh6]

Hi! Everyone,
I have two Phalaenopsis that I suspect might have leaf diseases, and I was hoping you could help me identify and treat them.
The one with the mottled leaves has a long dark line and many small dark spots. The other one has brown patches on its leaves. I've attached pictures of both plants for your reference.
Could you please take a look and let me know what you think? Any advice on how to treat these issues would be greatly appreciated.
Thank you so much for your help!

[Waterdog111]

Looks like scale!

[Dimples]

Doesn’t look like anything out of the norm to me.