[Public-List] painting prop

[Mel Martin]

Penaten is basically zinc oxide, suspended in an ointment (probably  
mostly lanolin-based).

Years ago (many!) I conducted a series of toxicology tests on the use  
of zinc and zinc oxide as an algaecide. The product we were testing  
was intended to be a replacement for the high levels of chlorine and  
bromine used to control algae growth in swimming pools. Zinc, in both  
its elemental form and its oxide was surprisingly effective at killing  
blue-green algae (cyanobacter), even at low concentrations. I would  
not be at all surprised to find that in the form of Penaten it was  
effective at controlling other bio-growth such as fouls propellers.

Maybe the fisherfolk are onto something. I can imagine West Marine  
marketing a twenty-five dollar tin of baby bum ointment as  the  
latest, high tech anti-fouling agent for props.

mel
hull # 452 - renamed Sadhu

PS my four babies' bottoms all benefited from Penaten to control  
diaper rash - 'course, that was in the days before disposable diapers ;)


Message: 1
Date: Sun, 20 Mar 2011 22:19:16 -0700
From: Debra Fontaine <debrafontaine at live.com>
To: public-list at lists.alberg30.org
Subject: [Public-List] painting prop
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The fishermen in the boat yard I was in put penaten on their prop. Its  
diaper cream and they claim that putting it on their propellers stops  
stuff from sticking to it. I don't know. Another guy in the boatyard  
put shoe polish on his. I put shoe polish on mine last year I will  
find out how well it worked when I see the bottom in April Number 155  
La Plaoma




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