Originally Posted by patricej

i'd feel most safe waiting until the blocks were attached to the background before starching - very carefully and front only.
those blocks look pretty darned good. (thumbs up)
you don't want to press them out of shape by accident.

ahhh... key word here is "press." (iron moves only up and down) avoid the temptation to iron (moving the iron sideways in one or more directions across the surface.