Scum and Stain Removal from Hull - SailNet Community
 9Likes
Reply
 
LinkBack Thread Tools
post #1 of 27 Old 12-07-2014 Thread Starter
Senior Member
 
Join Date: Aug 2011
Posts: 253
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 8
 
Scum and Stain Removal from Hull

Not sure what caused it but I have a reddish brown stain on the hull that I would like to clean off. I'm not the only boat in the yard in the issue so definitely something in the water and not just age. Scum and Stain Removal from Hull-imageuploadedbytapatalk1417999154.761668.jpgScum and Stain Removal from Hull-imageuploadedbytapatalk1417999171.561227.jpg

Any ideas on how to remove? Topsides are circa 1985 gelcoat.

In same vein, could use recommendations for cleaner/wax, the 3M stuff did not do well on last attempt.

Josh
engineer_sailor is offline  
Sponsored Links
Advertisement
 
post #2 of 27 Old 12-07-2014
Senior Member
 
christian.hess's Avatar
 
Join Date: Sep 2013
Location: Columbus, Ga
Posts: 4,589
Thanks: 189
Thanked 190 Times in 185 Posts
Rep Power: 6
 
Re: Scum and Stain Removal from Hull

just did this

pesticide bottle with bleach spray rinse with ample water

done

Merit 25 sold...Islander 36 still afloat? who knows...Im still in Columbus, and back...I think...jajajaja!!!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
christian.hess is offline  
post #3 of 27 Old 12-07-2014
Warm Weather Sailor
 
Vasco's Avatar
 
Join Date: Sep 2006
Location: Toronto
Posts: 1,039
Thanks: 0
Thanked 12 Times in 11 Posts
Rep Power: 13
 
Re: Scum and Stain Removal from Hull

Oxalic acid in all its different guises, as crystals from Home Depot. FSR from West Marine, and Barkeepers Friend from any grocery store, (my favourite). Or hull cleaner from Walmart (Attwood hull cleaner).
RichH, Ajax_MD and christian.hess like this.

Rick I
Toronto in summer, Bahamas in winter.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Vasco is offline  
 
post #4 of 27 Old 12-07-2014
Senior Member
 
CapnChuck's Avatar
 
Join Date: Apr 2013
Posts: 122
Thanks: 0
Thanked 10 Times in 10 Posts
Rep Power: 7
 
Re: Scum and Stain Removal from Hull

We use a product found at most hardware stores or Home Depot made by Goof-Off. It's just called Rust Remover. Spray or wipe it on, watch the stain disappear and rinse thoroughly. We use it all the time to get the stains off the hull while running the river systems and some parts of the ICW. Chuck
christian.hess likes this.

Our Blogs

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CapnChuck is offline  
post #5 of 27 Old 12-07-2014
Living the dream
 
ReefMagnet's Avatar
 
Join Date: May 2008
Location: Mackay Qld AU
Posts: 345
Thanks: 6
Thanked 20 Times in 19 Posts
Rep Power: 12
 
Re: Scum and Stain Removal from Hull

Quote:
Originally Posted by Vasco View Post
Oxalic acid in all its different guises, as crystals from Home Depot. FSR from West Marine, and Barkeepers Friend from any grocery store, (my favourite). Or hull cleaner from Walmart (Attwood hull cleaner).
+1 For oxolic acid. Cheap, wipe on-wipe off effective and is probably the base ingredient for a lot of $$$ specialty products. Just keep it away from galvanising.
ReefMagnet is online now  
post #6 of 27 Old 12-07-2014
Senior Member
 
christian.hess's Avatar
 
Join Date: Sep 2013
Location: Columbus, Ga
Posts: 4,589
Thanks: 189
Thanked 190 Times in 185 Posts
Rep Power: 6
 
Re: Scum and Stain Removal from Hull

cheaper than bleach? jajaja

Merit 25 sold...Islander 36 still afloat? who knows...Im still in Columbus, and back...I think...jajajaja!!!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
christian.hess is offline  
post #7 of 27 Old 12-07-2014
Living the dream
 
ReefMagnet's Avatar
 
Join Date: May 2008
Location: Mackay Qld AU
Posts: 345
Thanks: 6
Thanked 20 Times in 19 Posts
Rep Power: 12
 
Re: Scum and Stain Removal from Hull

Quote:
Originally Posted by christian.hess View Post
cheaper than bleach? jajaja
Purchased as oxalic acid crystals is cheap enough to count the difference in pennies. Oxalic acid is also known as "wood bleach". I used to use it to clean my hobie 16's waterline after it had been sitting in muddy water for a few days and nothing comes close to how well it does the job imo. The odd thing is oxalic acid is recommended for removing rust stains and I have to say I've really never had what I would call good results with it when used for that purpose.
christian.hess likes this.
ReefMagnet is online now  
post #8 of 27 Old 12-07-2014
Senior Member
 
christian.hess's Avatar
 
Join Date: Sep 2013
Location: Columbus, Ga
Posts: 4,589
Thanks: 189
Thanked 190 Times in 185 Posts
Rep Power: 6
 
Re: Scum and Stain Removal from Hull

bleach cleaned my teak pretty damn well too!
good to know...next time ill use oxalic acid

in any case 2 galons cleaned my whole hull

how much does oxalic acid cost at the dollar store?

Merit 25 sold...Islander 36 still afloat? who knows...Im still in Columbus, and back...I think...jajajaja!!!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
christian.hess is offline  
post #9 of 27 Old 12-07-2014
Living the dream
 
ReefMagnet's Avatar
 
Join Date: May 2008
Location: Mackay Qld AU
Posts: 345
Thanks: 6
Thanked 20 Times in 19 Posts
Rep Power: 12
 
Re: Scum and Stain Removal from Hull

I brought a 500 g container about 10 years ago and still have plenty left. You don't add much to (warm) water to get an effective strength. I think it was about 10 bucks or so at the time. That's in AU dollars and we seem to pay double of what everyone else does

No idea what it's worth now but it's not expensive. Just cant get it in lemon scent
ReefMagnet is online now  
post #10 of 27 Old 12-08-2014
Sailor
 
Gladrags1's Avatar
 
Join Date: Apr 2003
Location: Rock Creek, Maryland
Posts: 899
Thanks: 13
Thanked 38 Times in 38 Posts
Rep Power: 17
 
The brown stain occurs because the gelcoat has become more porous as it ages. You want to be careful about making it more porous and make sure you seal it well.

We used MEK to clean, then a light compound. Then seal the hull with Scotchguard in the black bottle. I'd be afraid of damaging the gelcoat with too harsh chemicals.

The stain has not returned in 3 years even though we have not hauled the boat to reapply the polish (we plan to do that this Spring.)

Tod
Gladrags1 is online now  
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Catalina 22- Patching Sail, Weathered rigging & Teak, Hull stain cleaning? acem Gear & Maintenance 9 09-15-2014 10:03 PM
Hull Paint Removal Pcpk Gear & Maintenance 3 04-18-2014 10:57 PM
Thru hull removal Minnewaska Gear & Maintenance 12 11-03-2012 06:37 AM
Sail Rust Stain Removal davidusvi Gear & Maintenance 8 08-13-2012 11:58 PM
Thru Hull Removal Stormer Gear & Maintenance 7 02-27-2003 04:33 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome