I am installing fiberglass tub walls over newly installed greenboard. I primed the greenboard with an oil based primer(BIN Seal by Zinnser) to give some added waterproofing. Upon receiving the tub walls, the directions state NOT to prime where the adhesive is to make contact with the greenboard. What would be my best course of action at this point?? I was thinking maybe lightly sanding the primer??
I tried contacting the manufacturer, but of course, no reply. Really could use some answers on this!