Currently you need to craft the headpiece in order to unlock it for Xmog. If you just buy the helm, it doesn't unlock it,
even if you're already an engineer.
Currently you need to craft the headpiece in order to unlock it for Xmog. If you just buy the helm, it doesn't unlock it,
even if you're already an engineer.
If the engineering goggles are BoE, you can definitely unlock it for transmog just by equipping/vendoring it.
But by default, appearances unlocked in this manner requires the character to have engineering as a profession and be the correct armor type to transmog the goggles.
If you want cosmetic versions of the engineering goggles, you need to craft every individual goggle of each type at least once for the achievement.
Even then, you need engineering as a profession to transmog the goggles, but armor type can now be ignored.