You might be over-watering. I notice those spots on some of my thicker leaved hoyas. If I reduce watering, they seem to fade within a month.

Thanks Aurorawa. I've been misting a couple times a days (to make sure mites stay away). I guess I shouldn't hit that one as much.

Normal for some hoyas,but overwatering makes sense,being it leads to unhealthy roots that become less effective in taking up nutrients which can lead to deficiencies. ..here is hoya sp. IV from WMZ. Has new growth,hard leaves but similar spots.

I noticed the same spots on cv joy today and asked myself the same thing, though I wouldn't say I water too much. Maybe I do :P However, I do think the specks look pretty cool..