Black exterior teak - SailNet Community
 
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post #1 of 10 Old 12-05-2007 Thread Starter
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Black exterior teak

Is there a good way to get the black out?
I will be putting the tarp back over this weekend and I would like to get the black stain out somehow.
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post #2 of 10 Old 12-05-2007
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All the typical teak cleaners help. Oxalic acid is the main ingredient I believe. I read an artical about Teak and how, no matter what you do or use the oils in the teak and the finish turn black from the UV. good luck!

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post #3 of 10 Old 12-05-2007
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Jet washing, set to "fan" pattern works well. Do not get too close. Scrubbing is too damaging for my liking.
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post #4 of 10 Old 12-05-2007
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I have very good results from using a white plastic scrub pad (from the grocery store) and seawater and rubbing across the grain. I do this monthly and although it is a timely process, it works well. A friend uses a plant spray type pressure cannister with a bleach and water solution and lets that dry on the deck. Works well for him but I'm not happy about spraying chlorox around the boat. Good luck.


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post #5 of 10 Old 12-05-2007 Thread Starter
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Jim -
Do you know how much bleach to water?
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post #6 of 10 Old 12-05-2007
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I use 2 parts water and 1 part bleach. I also buy the off brand bleachs for they are not as strong. I apply it with a foam brush.

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post #7 of 10 Old 12-05-2007
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Not sure what the "safe' ratio would be, but be carefull with bleach. I've heard many times over that it will damage gelcoat.
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post #8 of 10 Old 12-05-2007
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Pressure spray works for mine better than any chemicals.
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post #9 of 10 Old 12-05-2007
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The Black is mildew. Bleach works better and safer for gel coat than most teak cleaners. X14 a high power mildew remover painters professional cleaners use , worked wonders on my vessel. After a year of non use she had mildew all over decks, side benefit I discovered the teak handrails returned fresh milled color (never varnished) caution not sure but hatches started leaking, in rebedding them I discovered the 5200 sealant was unstuck from the aluminum and pealed off the fiberglass way easier .
If bleach damages gel coat then have I destroyed my fiberglass water tanks by adding bleach to kill the bacteria and taste in the tanks?
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post #10 of 10 Old 12-05-2007
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Of course, if you're boat is on salt water, the salt water will help kill the mildew... if you're on fresh water, other options will be necessary.

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