rusty sort of something attacking my oncidium

[plantaholic]

Help!
I've searched the other threads and can't find this. I don't think these are spider mites. I've had those on other plants off and on over the years. This is something else. Not scale, not mealybugs. I think its some kind of mite. I need some advice on what home remedy would work. I've used alcohol for scale and a few really good showers took care of an aphid problem on a miltonidium.
I have no idea what to do with this and its already attacking two orchids. Any ideas?