"Rob Halgren" wrote in message
...

But would you do this on a poly covered house? I don't know if
polyethylene film reacts with bleach or not, or if you could scrub off
any UV inhibitors or other coatings... Just curious.

What's twinwall made out of? Isn't it some sort of polycarbonate? And the
UV inhibitor is on the outside - of the twinwall I bought... I can't speak
for fiberglass.

K