I use a boat fiberglass hull cleaner. It does a nice job getting the
surface clean and removing fine scratches.
OhioBeeFarmer
Getting Kids Involved in 4H Beekeeping
www.homestead.com/BeeKeepers/
www.homestead.com/BeeKeepers/BeesRUs.html
Subject: [BEE-L] cleaning observation hive
Something that won't damage the
plexi-glass or hurt the bees.