Reply
 
Thread Tools Display Modes
 
Old 04-30-2017, 01:55 AM   #1
Newbie
 
City: Pacifica
Country: US
Vessel Name: Grand Cru
Vessel Model: Grand Banks Classic 1971
Join Date: Apr 2017
Posts: 2
just had housing painted on my Grand Banks and blistering!

Only on the port side which is subjected more to weather. This is a wooden beauty classic design and very dismayed about this and wondering what caused this? This is not on the hull but on the upper housing.
Big issue as the person who did the job is coming up with all kinds of excuses.
Best,
Mo
__________________
Advertisement

Modarcy3054 is offline   Reply With Quote
Old 04-30-2017, 03:05 AM   #2
Guru
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 7,256
Mo, I have that problem on the painted timber exterior layer(about 1 cm thick) on my transom.
What is in the blisters? Water?
What was it painted with?
Was it in a shed and well protected?
Was it humid during the painting period?
Is the paint used the same as the previous paint(? 2 pack over single pack or vv?)
Did you see the prep work, was it thorough?
Finally, what are the excuses. And upsetting as it may be, how about pics of the blistering?
__________________

__________________
BruceK
Island Gypsy 36 Europa "Doriana"
Sydney Australia
BruceK is offline   Reply With Quote
Old 04-30-2017, 04:34 AM   #3
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted trawler
Join Date: Jul 2016
Posts: 642
Have a recurring bubble on the hull using marine/oil rig/supertanker grade enamel.
$h1t happens apparently.
Simi 60 is offline   Reply With Quote
Old 04-30-2017, 05:05 AM   #4
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,206
Paint on wood bubbling comes from painting damp wood.
FF is offline   Reply With Quote
Old 04-30-2017, 11:43 AM   #5
Senior Member
 
City: Chicago
Country: United States
Vessel Name: Sea Jay
Vessel Model: Non Trawler ;-) Ask me if it matters LOL
Join Date: Jun 2016
Posts: 194
Pics? Also is the previous layer of paint known as to type? Was it reduced down, roughed, cleaned?
Gmarr is offline   Reply With Quote
Old 04-30-2017, 03:06 PM   #6
Guru
 
dhmeissner's Avatar
 
City: Seattle
Country: North America
Vessel Name: The Promise
Vessel Model: Roughwater 35
Join Date: Sep 2012
Posts: 1,246
Quote:
Originally Posted by FF View Post
Paint on wood bubbling comes from painting damp wood.
__________________
Dave & Suzie - Roughwater 35
http://thepromiserwb1029.org/2012/09...the-promise-2/
dhmeissner is offline   Reply With Quote
Old 04-30-2017, 11:05 PM   #7
Guru
 
Bob Cofer's Avatar
 
City: Bellingham
Country: US
Vessel Name: Ebbtide
Vessel Model: '72 Grand Banks
Join Date: Aug 2013
Posts: 969
just had housing painted on my Grand Banks and blistering!

Prep, prep, prep

Click image for larger version

Name:	IMG_2059.jpg
Views:	114
Size:	81.7 KB
ID:	64313

Click image for larger version

Name:	IMG_2061.jpg
Views:	120
Size:	86.9 KB
ID:	64314

Click image for larger version

Name:	IMG_2063.jpg
Views:	112
Size:	100.5 KB
ID:	64315

Still need another coat of primer and sand some more, then it's time for color.
__________________
What kind of boat is that?
Bob Cofer is online now   Reply With Quote
Old 07-18-2017, 04:07 PM   #8
Newbie
 
City: Seattle
Country: USA
Join Date: Jul 2017
Posts: 2
Quote:
Originally Posted by Modarcy3054 View Post
Only on the port side which is subjected more to weather. This is a wooden beauty classic design and very dismayed about this and wondering what caused this? This is not on the hull but on the upper housing.
Big issue as the person who did the job is coming up with all kinds of excuses.
Best,
Mo
I went through the same......so learned a few things : never paint wood when humidity of the actual wood reads more than 15%. TrY to find out what paint was used originally, or what was the last coat? Unfortunately I have not been able to find out what American Marie used in 1968, but I am pretty certain it was an oil based paint and primer. So now I am stripping the cabin down to bare wood and start over again........would love to find out what original paint was.......good luck, hope it will work out in the end!
GB3295 is offline   Reply With Quote
Old 07-18-2017, 04:12 PM   #9
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 9,886
Greetings 3295,
Welcome aboard.
__________________
RTF
RT Firefly is offline   Reply With Quote
Old 07-20-2017, 01:35 PM   #10
Senior Member
 
City: Westerly, RI
Country: USA
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 378
Very true that bubbling paint = wet wood. It MIGHT not be from water that was there prior to painting.

Is there a leak? Technically a leak top side could wick into the wood and push out causing the paint to bubble from the inside.
Shrew is online now   Reply With Quote
Old 07-20-2017, 09:37 PM   #11
Veteran Member
 
City: Lake Lanier, GA & on loop
Country: usa
Vessel Name: Deja Voom & Seasons
Vessel Model: 42 Tayana PH Trawler
Join Date: Mar 2014
Posts: 36
Take a look at Smiths penetrating epoxy sealer known as CPES .... Wood boat Resto guys use it works quite well ...not a 'west' type epoxy ...Great base for wood.
bgillroy is offline   Reply With Quote
Old 07-22-2017, 03:35 PM   #12
Newbie
 
City: Seattle
Country: USA
Join Date: Jul 2017
Posts: 2
Hi, thanks for the tip! By sheer coincidence I heard about this a few days ago, and bought it, so will use it in a few weeks. U will post my findings. Thanks to all of you who reacted with advice, much apreciated!!
GB3295 is offline   Reply With Quote
Old 07-22-2017, 07:15 PM   #13
Guru
 
C lectric's Avatar
 
City: Somewhere
Country: , Canada
Vessel Name: Island Pride
Vessel Model: Palmer sedan 32'
Join Date: Oct 2007
Posts: 1,758
The wood needs to be dry even for CPES. I don't use that make by name but a similar water thin epoxy intended for the same applications.

Take a look for leaking just above such as from the windows. I too have wood framed windows and over the years have epoxied and caulked the actual track mounting areas . I didn't have leaks per se but the actual wood would absorb moisture causing trouble with the frame finish sometimes.

I initially used Pentaphenol and then my CPES equivalant [S-1}. Seems to have helped.
ALso make sure the drains for the sliding windows are clear, kept clear and working or water may back up into areas you never thought of.
C lectric is offline   Reply With Quote
Old 07-22-2017, 07:22 PM   #14
Guru
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 7,256
If the wood has moisture in it, and you seal the exterior with epoxy wood sealer preserver,and then paint, where does the moisture go?Inside?
I`ve got a problem with my transom which has a layer of (what was exposed )teak over the fibreglass. Someone painted it, the paint bubbles. I can`t work out how the moisture gets in.
Moral is, you need to know why it gets moist.
__________________
BruceK
Island Gypsy 36 Europa "Doriana"
Sydney Australia
BruceK is offline   Reply With Quote
Old 07-23-2017, 10:35 PM   #15
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted trawler
Join Date: Jul 2016
Posts: 642
Cpes and equivelants are a bit of a ripoff, you pay a hell of a lot of money for thinners and very little epoxy and as the thinners flash off it leaves pinholes so no waterproof barrier.

Better option in my opinion is epoxy thinned with 10% metholated spirits and a biocide followed by undiluted coats after first one has kicked off.
Simi 60 is offline   Reply With Quote
Old 08-19-2017, 11:47 PM   #16
Veteran Member
 
City: Lake Lanier, GA & on loop
Country: usa
Vessel Name: Deja Voom & Seasons
Vessel Model: 42 Tayana PH Trawler
Join Date: Mar 2014
Posts: 36
CPES works as a penetrating sealer not a hard West type product ..works quite well for the classic wood boat restorers ...wood has to be dry to spec.
bgillroy is offline   Reply With Quote
Old 08-20-2017, 09:26 AM   #17
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 1,262
I have good results with water based ZINSSER Bull's eye primer under all types of paints. If painting over bare wood surfaces, you need a good primer.

Zinsser® Bulls Eye 1-2-3® Water-Base Primer Product Page

I have never had this blistering problem on my wood boat. I also don't paint damp or wet wood. I don't go to any extremes with painting wood. I will clean the old paint, maybe sand, maybe not, maybe sand to bare wood, various things.

I have found that mixing in pink RV antifreeze into water based paints allows for smooth coats of paint.
__________________

sdowney717 is online now   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 07:42 AM.


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