Originally Posted by Jedihippie
if you use an iron on plastic youll ruin a mask... thats what i was referring to. and i mentions that steam and adhesive dont mesh well. I work with vinyl everyday, I apply my own adhesive after steaming
I think you jumped in the middle without reading the whole thread.
We're talking about applying adhesive vinyl to goggles. The kind you might use on a car. You would never use steam to apply it, only to remove it. You can use a heat gun to aid in application.
The second part was referring to applying special heat transfer vinyl to fabric. For that you can use an iron but it isn't recommended. It sounds like you're applying adhesive to vinyl fabric for upholstery, not exactly what he was referring to.