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 Hull Stains		  New Topic  Topic Locked
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Tony Partain
1st Mate

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USA
93 Posts
Initially Posted - 06/07/2004 :  10:51:44  Show Profile
Trading Time has been on the water for three months now and was pulled out yesterday to add a spinnaker halyard and bottom paint. After spending three months in Klamath Lake I found that the algae growth was significant. I spent the afternoon power spraying and scrubbing. Its all gone except the brown staining on the hull from the water line down. The previous owner dry sailed the boat and the hull was the same color above the water line as below. Does anybody know what cleaner will finish the job by removing the brown staining?
Also my trailer has bunks and I need the raise the boat off of the bunks to clean and paint under them. When jacking the boat up what technique is used to keep the jack stable due to the angled surfaces?
Tony Partain
Bend Oregon
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 06/07/2004 :  11:12:13  Show Profile
Tony,

I use regular toilet bowl cleaner to remove organic stains from my hull. First I paint or wipe on the thickened cleaner and let it sit for around 10 or 15 minutes so it can work its magic. For particularly stubborn areas, I will lightly scrub the toilet bowl cleaner with a scrubby sponge, then thoroughly rinse off the cleaner.

Remember that toilet bowl cleaner is hydrochloric acid so wear rubber gloves, a long sleeve shirt, eye protection, and keep a water supply handy to rinse off you skin if you get it on you.

Additionally, I do this at a boatyard, but if you do this at home, be aware that it may turn your nice green lawn to a light tan color shade.
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Tony Partain
1st Mate

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USA
93 Posts
Response Posted - 06/07/2004 :  11:47:36  Show Profile
Don will the toilet bowl cleaner harm the galvanized finish on a trailer? As for the brown yard I will do this at the boat yard to avoid refinishing my yard
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 06/07/2004 :  13:21:19  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Tony Partain</i>
<br />Don will the toilet bowl cleaner harm the galvanized finish on a trailer?...<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

I've used toilet bowl cleaner on trailered/cradled boats for years and I've never noticed any corrosion problems. Everything that gets the toilet bowl cleaner treatment gets a very thorough rinsing when done.


I don't really know if it will harm your galvanized trailer, but it is an acid, and although somewhat diluted, it can be harmful to base metals. As with any cleaning agent, you may first want to test it in an inconspicuous place to make sure it is safe.

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Tony Partain
1st Mate

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USA
93 Posts
Response Posted - 06/07/2004 :  14:26:21  Show Profile
Has anybody used oxalic acid for cleaning water line stains?

I guess my theory of jacking the boat up off of the pads is not the smartest thing I came up with this week. After researching the Bottom Jobs on the forum all I need to do is lower the pads one at a time. DUH!!! Sometimes the simplest things are right in from of you and just can't see them with out a little help!! At this point I am wondering if I will need help to open the paint can!
Edited by - Tony Partain on 06/07/2004 17:14:59
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 06/10/2004 :  22:28:53  Show Profile  Visit Douglas's Homepage
The brown stain you talk of is from Tannin in the water. Decomposed leaf and such. Most acid washes will work but the cheapes of all is christal form Oxalic acid. 1 teaspoon per gallon to start with or stronger if it doesnt work. Find it at the hardware store. A google search under Tannin stains Boat Hull will provide you with a wealth of information
Edited by - Douglas on 06/10/2004 22:37:45
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Tony Partain
1st Mate

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USA
93 Posts
Response Posted - 06/10/2004 :  23:48:43  Show Profile
Doug thanks for the tip I have found some oxalic acid here in Bend and will give it a try this Saturday. After the acid wash the bottom painting starts!!! No sailing this weekend but at least I get to make the boat a little faster!!
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Oscar
Master Marine Consultant

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USA
2030 Posts
Response Posted - 06/11/2004 :  00:18:39  Show Profile  Visit Oscar's Homepage
Just got the sneak preview from Practical Sailor. This very subject is to be discussed.

Oscar
Catalina 250WB#618 Currently FOR SALE:
http:www.woodenshoemusic.com/C250WB
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Tony Partain
1st Mate

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USA
93 Posts
Response Posted - 06/11/2004 :  00:21:28  Show Profile
Tell us more.
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sailgal
Captain

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USA
400 Posts
Response Posted - 06/22/2004 :  11:15:43  Show Profile
This is from the July 1 04 Practical Sailor issue....They tested 7 waterline products and found Aurora Waterline Stain Remover (toxic) to be the best. Runner up is stuff called Y-10 and Davis FSR. Next in line Marykate On&Off and Toon-brite. Last place were West Marine Hull cleaner and dead last 3M marine Heavy Duty Hull and Deck Cleaner.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.