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Go Back   SailNet Community > On Board > Gear & Maintenance > Gelcoat Mildew-I'm so sick of gelcoat mildew
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Thread: Gelcoat Mildew-I'm so sick of gelcoat mildew Reply to Thread
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Topic Review (Newest First)
02-12-2013 10:55 PM
bwindrope
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.
02-12-2013 09:27 PM
neverknow
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

Quote:
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?
02-12-2013 06:51 PM
SloopJonB
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

Quote:
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.
02-12-2013 05:36 PM
bwindrope
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.
02-12-2013 02:58 PM
SloopJonB
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.
02-11-2013 10:17 PM
Alex W
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

Quote:
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.
02-11-2013 10:08 PM
pdqaltair
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.
02-11-2013 09:17 PM
OPossumTX
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

Quote:
Originally Posted by Alex W View Post
"Wet and Forget" appears to be some sort of a pesticide. Not the kind of thing that I want to be dumping into the local waters.

I'm reading this thread with interest. My old Catalina 25 has the same problem (it is also in Seattle, on Lake Union), and I still sail on it often since a friend of mine bought it from me. I've never found the perfect solution, but Woody Wax was next on our list of things to try.

It's not a problem in the boat, only on the non-skid surfaces.
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. Perhaps it would only be suitable to be applied on the hard or on trailer boats away from the water until the stuff drys. I know it worked on my Rubbermaid mail box, composition shingle roof, brick walls, car port and sidewalks all of which are at least several hundred feet from any body of water.

If you rushed out and bought some, I suggest that you read and obey the label to avoid illegal activities concerning the product.
02-05-2013 07:34 PM
Minnewaska
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

If you get to it before it really stains the gelcoat, spray tub and tile cleaner works pretty well. Particularly, those that are bleach based.

I would buy an electric polisher and get to some serious waxing. All that cleaning does really stink. I can't stand being aboard, if it looks that bad. I bet a good waxing would be less work in the long run. Just don't wash it with anything that will take the wax off.
02-05-2013 01:54 PM
bwindrope
Re: Gelcoat Mildew-I'm so sick of gelcoat mildew

There is no end of good options for toxic cleaners to kill the mold, both inside and outside of our boats. That's the good news. Inside, my Gulf is a teak palace, and I use lemon oil on the unvarnished teak and find that works well so long as I don't let it go too long.

No, my problem is really just on the decks. I would go the route of polishing and such, and have done that, but I find that even after a huge amount of work, with all the right products, I get maybe 4-5 months of decent shine and it is back to being powdery. So I'm done with the labor intensive options.

I like the idea of one of the simple wipe on pore fillers, and if they would leave a more lasting shine and plug the pores to prevent moisture and mold retention, then I am all for it. I have no plans to paint my hull anytime soon, so even if I use a product with polymers or silicone like Nu Finish, I don't care that I would have to strip it deep to paint it, because I have no plans to paint it!
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