I know this is no help at all! but what material is it constructed from, 'cos this will determine what you can safely use. For that matter, I'd like to know what my Honwave 3.2 airdeck is made from (it's for sale in case anyone missed it) so that I can bring it up to as new condition, so I guess we're both hoping for some advice on this subject. By the way, what to use for cleaning mooring ropes with?