Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-10-2014, 14:49   #1
Registered User

Join Date: Dec 2010
Posts: 48
Sundamaged gelcoat

I just bought a Scandinavian built sailboat, that have spend some time in the Caribian sun. There is no glosh in the gelcoat, but it appears there are very small holes filled with black dust. Even though i have tried with sandpaper 240, i cant get it off. Any ideas? Any other solution than new gelcoat?


Sent from my iPad using Cruisers Sailing Forum
__________________

__________________
jesperht is offline   Reply With Quote
Old 04-10-2014, 15:13   #2
Senior Cruiser
 
atoll's Avatar

Cruisers Forum Supporter

Join Date: Mar 2010
Location: gettin naughty on the beach in cornwall
Boat: 63 custom alloy sloop,macwester26,prout snowgoose 37 elite catamaran!
Posts: 9,311
Images: 75
Re: Sundamaged gelcoat

Quote:
Originally Posted by jesperht View Post
I just bought a Scandinavian built sailboat, that have spend some time in the Caribian sun. There is no glosh in the gelcoat, but it appears there are very small holes filled with black dust. Even though i have tried with sandpaper 240, i cant get it off. Any ideas? Any other solution than new gelcoat?


Sent from my iPad using Cruisers Sailing Forum
eeek if you must sand you should be using wet and dry 1200-2000 grit with water,then a polishing machine using silicone polishing wax.

cleaning first with phopheric acid will remove stains and salt,then a degreaser ,bleach and hull cleaner work well as well,before polishing with a buffer pad
__________________

__________________
my catamaran building project updates http://www.cruisersforum.com/forums/...36#post2502136
atoll is offline   Reply With Quote
Old 04-10-2014, 15:19   #3
Registered User

Join Date: Dec 2010
Posts: 48
Sundamaged gelcoat

Yes i know that, but there is no problem in polishing up from 240. I use 400,600,800,1000,1500 and 2000. But sanding is clearly not the solution.


Sent from my iPad using Cruisers Sailing Forum
__________________
jesperht is offline   Reply With Quote
Old 04-10-2014, 15:20   #4
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Sundamaged gelcoat

Very likely porous Gelcoat. Long term the only solution is a paint job. Short term try using boat soap mixed with some bleach. Then wax with several coats of a quality marine paste wax, to fill the pores.
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 05-10-2014, 18:38   #5
Registered User

Join Date: Jul 2012
Location: FL
Boat: 45' Aft Cabin Motor yacht
Posts: 86
Re: Sundamaged gelcoat

My little boat is a 23' twin engine runabout. It has sat in the Florida sun for the past 9 years with very little done to it other than an occasional washing.

This past week I decided it was time for a change. The photos below show about a 2 hour work process using a DA polisher and Meguiars polish and wax. The polish was the professional mirror glaze #9 swirl remover followed by the #26 yellow wax. I have a total of $35 in both products.





__________________
k9medic is offline   Reply With Quote
Old 05-10-2014, 19:13   #6
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 6,385
Re: Sundamaged gelcoat

Tips For A Great Buff Wax - SailboatOwners.com
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 05-10-2014, 20:12   #7
Senior Cruiser
 
zengirl's Avatar

Cruisers Forum Supporter

Join Date: Jun 2014
Location: Florida
Boat: 1985 Freedom Mach1 32'
Posts: 292
Re: Sundamaged gelcoat

Quote:
Originally Posted by Stu Jackson View Post
Is this the same Stu Jackson that came to visit Karen on Mettitt Island?

__________________
zengirl is offline   Reply With Quote
Old 05-10-2014, 22:01   #8
Registered User

Join Date: Dec 2010
Posts: 48
Re: Sundamaged gelcoat

Looks nice! I guess that means, that my gelcoat is not sundamaged, but has been like that fra day one? Only thing is, it is only some vertical surfaces that has the problem.


Sent from my iPad using Cruisers Sailing Forum
__________________
jesperht is offline   Reply With Quote
Old 05-10-2014, 22:53   #9
Registered User

Join Date: Feb 2008
Posts: 2,061
Re: Sundamaged gelcoat

Gelcoat thats become faded and porous will eventually need painting. K9medic may be happy now but let's see his boat again in 6 months. Been there own the polisher and compounds and waxes. I also tried the miracle polymer coatings recommended by PS but they degrade too, then you're back to stripping them (a lot of work) and compound/wax because the final answer is painting. Maybe I'll post some pictures tomorrow. I can tell a story with them.
__________________
SailFastTri is offline   Reply With Quote
Old 06-10-2014, 05:19   #10
Registered User

Join Date: Jul 2012
Location: FL
Boat: 45' Aft Cabin Motor yacht
Posts: 86
Re: Sundamaged gelcoat

Quote:
Originally Posted by SailFastTri View Post
Gelcoat thats become faded and porous will eventually need painting. K9medic may be happy now but let's see his boat again in 6 months. Been there own the polisher and compounds and waxes. I also tried the miracle polymer coatings recommended by PS but they degrade too, then you're back to stripping them (a lot of work) and compound/wax because the final answer is painting. Maybe I'll post some pictures tomorrow. I can tell a story with them.

I agree. The cutting on this particular polish is not too heavy but the results were more than I expected. Given the time involved, I could do this every 5 -6 months and still grin. I use the heck out of the little boat and don't really put too much concern in what it looks like but rather how it runs.

To do it "right" with wet sanding, polishing and waxing would involve the better part of 2-3 days on the boat. To me that's time better spend on the water.
__________________
k9medic is offline   Reply With Quote
Old 08-10-2014, 05:56   #11
Registered User

Join Date: Feb 2008
Posts: 2,061
Re: Sundamaged gelcoat

Follow up from above, pictures telling a story as promised:

This image below shows the gelcoat condition in it's faded state, in late Fall season (northeast US) only about 6 months after it was compounded to a high shine then waxed with (top rated) Treewax paste wax:



This image shows what it looked like immediately after compounding prior to Spring launch:




I got tired of spending about 30-40 hours each year compounding and waxing, so I decided to use Poly-Glo. This image shows what it looked like after treatment with Poly-Glo. Yes it looks good, but it's not as shiny or smooth as the compounded and waxed gelcoat finish. It also builds up and then eventually degrades from beneath and needs to be stripped. In the end I don't think it saved me any work:



I applied and re-applied the Poly-Glo as per directions, but after the second season it started to degrade from beneath the coating. So it had to be stripped. That is a tough job if you try to do it with their cleaner, but it's made a LOT easier if you use their stripper that comes in a spray can. Don't even try it without that spray stripper. This is what it looked like in a degraded state, before stripping:



So I went back to compound and wax for another year, then decided to have the boat painted. That was a great move. Yes it was expensive to have it done professionally but it has freed me of drudge work that I had come to dread, and my boat looks great year-round, not just two or three months a year. This is a freshly painted panel, still in the shop:

__________________

__________________
SailFastTri is offline   Reply With Quote
Reply

Tags
gelcoat

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gelcoat or paint R&B Construction, Maintenance & Refit 22 22-01-2007 22:51
Will Gelcoat adhere to Epoxy? GordMay Construction, Maintenance & Refit 22 03-12-2006 23:59
Gelcoat crazing Connemara Construction, Maintenance & Refit 5 30-10-2006 23:22
Oxidation Gelcoat Cleaner Bev & Bill Monohull Sailboats 19 02-06-2006 10:24
GELCOAT CRAZING (Part 1) GordMay Construction, Maintenance & Refit 5 24-05-2004 17:55



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:06.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.