Reply
 
Thread Tools Display Modes
 
Old 11-13-2014, 01:47 AM   #1
Veteran Member
 
City: Russell NZ
Country: Russell NZ
Vessel Name: MV Unique
Vessel Model: Salthouse Coastal 35
Join Date: Jul 2013
Posts: 47
Sap stains on paintwork

After drilling plug and screw holes in my hardwood (not Teak) belting and transom caps I have ended up with quite severe red staining over a large area of paintwork due to having been caught by rain before I could sweep down.
Does anyone know how to get this staining out, have scrubbed with fresh water and tried a mild abrasive cleaner to no avail.
__________________
Advertisement

Phil23 is offline   Reply With Quote
Old 11-13-2014, 04:31 AM   #2
Guru
 
siestakey's Avatar
 
City: Sarasota,FL/Thomasville,GA
Country: USA
Vessel Name: Steppin Stone IV
Vessel Model: Marine Trader Kelly Trawler 46
Join Date: Jul 2013
Posts: 1,271
Send a message via Skype™ to siestakey
Phil23

on another thread I started about deck and it is teak

I had a suggestion to use cascade

I might try a little in a small area
__________________

siestakey is offline   Reply With Quote
Old 11-13-2014, 10:02 AM   #3
Guru
 
hollywood8118's Avatar
 
City: Port Townsend Washington
Country: USA
Vessel Name: " OTTER "
Vessel Model: Ocean Alexander Europa 40
Join Date: Nov 2009
Posts: 1,482
Mix a tablespoon of oxalic acid powder to hot water, stir really well until completely dissolved, put the mix in a small spray bottle that has a adjustable tip, adjust the tip to atomize to a fine fist. Spray the effected area and let sit a few minutes, you may need to wipe the area with a cloth.. may not. After the stain is gone rinse the area with clear water. This will remove a plethora of stains from a lot of things. DO NOT BREATHE IN THE MIST.. you will immediately cough.. which tells me it is not good to breathe. Also works amazingly well to remove stains at home from a roof leak stain on your ceiling.

Cheers,
HOLLYWOOD
hollywood8118 is offline   Reply With Quote
Old 11-13-2014, 04:37 PM   #4
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
I'm not clear on your post. Is it bare wood that's stained or wood that's been painted and the stain is bleeding through. Oxalic acid mixed with water is used for bleaching wood (think stained decks, etc.) and may be effective on bare wood. If the wood has already been painted, get a stain blocking primer (Kilz is one brand) and cover the stain with as many coats as necessary, then repaint.
rwidman is offline   Reply With Quote
Old 11-13-2014, 06:30 PM   #5
Veteran Member
 
City: Russell NZ
Country: Russell NZ
Vessel Name: MV Unique
Vessel Model: Salthouse Coastal 35
Join Date: Jul 2013
Posts: 47
Sap Stains on paint work

Hi, the belting and transom caps which I have drilled are weathered hardwood, maybe Iroko, kwila or similar, a very red timber when drilled/sanded.
Saw dust and drilling chips felt onto boarding platform and deck areas and before I could sweep up it rained leaving red/brown stains everywhere.
Phil23 is offline   Reply With Quote
Old 11-13-2014, 06:39 PM   #6
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 9,997
Greetings,
Mr. 23. Sand some more, create sawdust, wet, and stain rest of platform the same color...call it "Environment Red"... or, tell the tale of repelling boarders...their blood won't wash out... or, repaint. Sorry, that's all I've got if none of the previously posted suggestions don't work.
__________________
RTF
RT Firefly is online now   Reply With Quote
Old 11-13-2014, 07:13 PM   #7
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
Quote:
Originally Posted by Phil23 View Post
Hi, the belting and transom caps which I have drilled are weathered hardwood, maybe Iroko, kwila or similar, a very red timber when drilled/sanded.
Saw dust and drilling chips felt onto boarding platform and deck areas and before I could sweep up it rained leaving red/brown stains everywhere.
Still confused, more than ever.

What is the material that is stained and is it painted, wood or gelcoat? Or something else?
rwidman is offline   Reply With Quote
Old 11-13-2014, 08:12 PM   #8
Veteran Member
 
City: Russell NZ
Country: Russell NZ
Vessel Name: MV Unique
Vessel Model: Salthouse Coastal 35
Join Date: Jul 2013
Posts: 47
The stained areas are painted with International Interspray 9000 and one area is Don't Slip antiskid paint.
Phil23 is offline   Reply With Quote
Old 11-13-2014, 09:15 PM   #9
Senior Member
 
BryanF's Avatar


 
City: Astoria
Country: USA
Vessel Name: Florence A
Vessel Model: 47' Sutton
Join Date: Oct 2014
Posts: 173
Well you could try phosphoric acid but the wood might not like it very much. Does wonders for rust stains on steel boats. And generally not that hard on paint. But YMMV.
Sold as ospho and other trade names. Don't know about yacht places but anyplace that has fish boat guys coming in will have it. I think H.D. has something similar too.
BryanF is offline   Reply With Quote
Old 11-14-2014, 04:27 AM   #10
Guru
 
siestakey's Avatar
 
City: Sarasota,FL/Thomasville,GA
Country: USA
Vessel Name: Steppin Stone IV
Vessel Model: Marine Trader Kelly Trawler 46
Join Date: Jul 2013
Posts: 1,271
Send a message via Skype™ to siestakey
In a small area first try TSP

Shop TSP All Purpose Heavy Duty Cleaner at Lowes.com
siestakey is offline   Reply With Quote
Old 11-14-2014, 07:48 AM   #11
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
Quote:
Originally Posted by Phil23 View Post
The stained areas are painted with International Interspray 9000 and one area is Don't Slip antiskid paint.
Now we're getting somewhere. The best plan is to contact the paint manufacturer and ask them what to do. In the meantime washing with soap and water or mild cleaners may help. What you don't want to do is harm the paint because then you'll have no choice but to repaint.

Sometimes prolonged exposure to sunlight will bleach stains out.
rwidman is offline   Reply With Quote
Old 11-14-2014, 01:16 PM   #12
Senior Member
 
City: Bohemia
Country: USA
Join Date: Sep 2014
Posts: 140
If it's painted, it's probably on the surface only. Try TSP and a scuffy pad. Don't push too hard.
__________________

chester613 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 05:09 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012