What are these spots on my Vanda leaves?
 

Hi all,

Was quite concerned this morning when I saw these spots....

They look slightly pitted, white in colour......and seems to appear quite a bit on bottom Vanda leaves (older ones).

What could that be?

I saw something like that on a phal after I got it home. I sprayed it down with the physin 20 and none of the other phals got it. I wonder if its some sort of sun or cold damage.

I see cold spots caused by water droplets and the sun(black pin dots)....the white spots look like its a residue of fertilizer or your water has some mineral deposits that dried out on the leaves on your first picture....your last picture seems like some tiny bugs sucking on the leaves.
Spray with physan 20 just to rule out fungi/bacteria infestation from those bites and black pin dots.