I've had my black truck for 6 months now and recently I noticed little white/grey spots covering the paint (mainly on the hood and front quarter panels). The spots will not come off with a finger nail, yet don't appear to be paint chips (they are smooth to the touch). My question is, since I have yet to wax the truck, has anyone encountered this and what should I do to try and remove these? Meguires 3-step? Clay bar?

Any responses/ideas would be greatly appreciated.

Edited for grammar .