The answer would be very carefully

It is easy enough to do, make sure the iron is set to dry (no steam) and use one of the lower heat settings. I would suggest that you start with the lowest setting and increase it slowly till the bubbles dissappear. I haven't used a cloth under the iron but if you are concerned about the finish then it would be wise to. If you are only taking out bubbles you shouldn't need a cloth, just hover the iron slightly above the surface.

I have seen pictures of an ARF factory in China where they were using standard household irons (probably from the factory next door ) to apply covering.

Cheers
Vaughan