Hey all, I continue to learn from this mistake.
I searched the posts and didn't find any info specific to my issues so here's what I have to date.
As Dorsal pointed out the drains holes were in the tanks, I just plain missed them due to not having built the wings or done the covering (failure to read closely enough)
The wonderful tech support at PolyFiber responded today (Sunday) and indicate the solution didn't do any fabric damage.
It did blister the paint on the wing and we are now discussing options to repair the finish as well as areas for additional grommets....