Large infestation of scales?

[grad2k1rulz]

I have quite a variety of plants I am caring for 3 of them being orchids. I bought this rather large 4ft tall orchid from dillions of all places (around mothers day) and over the past couple of months these white things have been taken over. Are they scales? They don't appear to move, are too small to see anything other than blob, they have taken over one long leaf and are starting on a second. I am using Sectracide Immunox 3n1 Insect & Disease Control Plus Fertilizer as an experiment to see if that takes them out, I'm also not going by the directions dosage because I don't see how spraying it once every 10days would work, I'm going to go for once every couple days and then try wiping it off to see if I have killed any of the buggers. The pictures were taken before treatment.

I have also read that White oil would work?

Others believe that throwing it out and getting a new plant is best lol. So, my question is what has worked for people? Or is this something else entirely?