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  #31  
Old 02-11-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

The LC50 (lethal concentation) for sunfish is 2.8 ppm for Wet & Forget. Copper sulfate, a worse idea, has an LD 50 as much as 100 times lower than that; unlike bottom paint, it is fully soluable and will wash right in.
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  #32  
Old 02-11-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

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Originally Posted by OPossumTX View Post
I went out and bought some "Wet and Forget" over the weekend. It says on the label something to the effect of not to apply it within 100ft of a stream, lake or other body of water to prevent contamination by run off.
I think that makes it illegal to use in almost all urban and suburban parts of Western WA, since most storm drains around here drain to the area lakes and Puget Sound.
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  #33  
Old 02-12-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

The most powerfully effective "conventional" soap I've used is dishwasher soap. I had to clean the dried on green slime etc. on a van that had been in the weather here for years - it washed off like a regular carwashing when I used the dishwasher soap.

It will strip off any scrap of wax or anything like that though so be prepared to re-wax immediately. It also leave your hands VERY "soapy" so wear plastic gloves or it will take hours to rinse your hands of the slipperiness.

Very cool stuff for those jobs that nothing else will touch.
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Old 02-12-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

I've always wondered about dishwasher soap. You can get versions of that stuff that are eco-friendly and may do a similar job.

I really appreciate that this thread includes a lot of sensitivity toward the marine life in our waters. I've been around long enough to remember when motor oil was just dumped in the dirt not far from the water in SoCal. When all manner of super toxic chemicals were dumped directly into LA Harbor after hours to avoid paying to have them dealt with (My family were longshoremen and knew these things).

We've come a long way as a society, and have further to go, and I appreciate that we sailors are increasingly sensitive about the chemicals we use on the vessels we use to explore our magnificent oceans.
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Old 02-12-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

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Originally Posted by bwindrope View Post
I've always wondered about dishwasher soap. You can get versions of that stuff that are eco-friendly and may do a similar job.

I really appreciate that this thread includes a lot of sensitivity toward the marine life in our waters. I've been around long enough to remember when motor oil was just dumped in the dirt not far from the water in SoCal. When all manner of super toxic chemicals were dumped directly into LA Harbor after hours to avoid paying to have them dealt with (My family were longshoremen and knew these things).

We've come a long way as a society, and have further to go, and I appreciate that we sailors are increasingly sensitive about the chemicals we use on the vessels we use to explore our magnificent oceans.
I watched a documentary on San Francisco Bay recently which had film footage from back in the 50's and even the early 60's where the bay was used by everyone as a dump - people would just back their cars down roads that ended at the water and push everything into the water - old appliances, construction rubble, mattresses, tires - everything. It was astounding that it was that bad in my lifetime.
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Old 02-12-2013
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

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Originally Posted by bwindrope View Post

Anyone else have these orange dots appearing on your boats this winter? It is the first time I have seen them and I'm scratching my head about what they are. They are scattered all over my boat, and there are no obvious solutions other than a growth of some sort.
Are you anywhere near the Boeing plant? Maybe the orange dots are falling off their new aircraft?
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Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

Ha! That explains it! No joke though, my wife and I used to live in Burlingame, CA, which is just south of SFO and our car and yard would get covered in fine black silt from the airplane exhaust. It was gross. Planes passed just a few thousand feet above us.
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