Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-10-2010, 22:49   #1
Registered User

Join Date: Sep 2010
Posts: 6
Ablative Above Waterline Paint ?

Hello

I've recently bought an older sail-boat, (glass over wood), that I'm repainting.

The top side deck seems to be the regular poly- fibreglass paint, but the outside of the hull, above the waterline has a glossy green paint that "powders" when I sand it. - That is to say that it sands very easily, it's a thin coat, no thicker than a couple coats of regular regular alkyd paint, but it seems/feels more like an ablative/antifouling paint when it's sanded.

My question is this: might this be a hard ablative paint? Is there some way to tell?
And if it is an ablative, is it re-coatable by lightly sanding then adding a new hard ablative?

Thanks for any help/advise
__________________

__________________
karma is offline   Reply With Quote
Old 13-10-2010, 23:10   #2
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
Ablative and hard modified-epoxy ottom paints are not ever glossy. Must be some old aklyd. Is it the boot stripe? Or is it the same paint that extends under the water?

Ablatives can be recoated after just a light sanding or a good scrubbing with water. Hard paint with a little more sanding. Ablatives are not real happy completely out of the water. Some cracking, discoloration.
__________________

__________________
daddle is offline   Reply With Quote
Old 14-10-2010, 00:43   #3
Registered User

Join Date: Sep 2010
Posts: 6
re-bootstripe

Ok, I don't know what a bootstripe is - this paint is above the waterline. From just above the waterline, which has a black bottom-cote, to deck-level and the outside kickrail.

I haven't tried wiping it down after sanding to see if the green still comes up or if was releasing green pigment because it was freshly sanded.

I'm hoping to get a good guess as as to what it might be so I can get something new to stick to it without having to completely remove it to the glass/gel.

Not really in a position to completely remove the old paint and use something like Brightside or Perfection.

It's been such a long time since I've had to sand old paint that I'm not familiar with how powdery the old coatings come off.

Whoever did the original paint-job used some kind of red/coppery primer under the deck coat, a very thick layer, and I'm not sure if that's normal for use on fibreglass or not.

The topside of the boat has the primer, but the outside of the hull above the waterline has this green paint directly on the fibreglass/epoxy
__________________
karma is offline   Reply With Quote
Old 14-10-2010, 01:03   #4
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
Just above the bottom paint...where it's normally dry...there is sometimes a 'bootstripe' of a different color. For design or to hide the grunge. Then from there on up to the toerail is the 'topsides' paint.

You must be sanding the topsides paint. It's probably some kind of enamel. Or it's the original Gelcoat. Sand it well and paint with EasyPoxie or Brightsides or something like that, I'd guess....
__________________
daddle is offline   Reply With Quote
Old 14-10-2010, 01:46   #5
Registered User

Join Date: Sep 2010
Posts: 6
Yeah, that's what I figured - and I guessed as to what the bootstripe might be - lol.

From all I've read on the forums, I'm also guessing that Brightsides is the best option other than the 2part system. Pricey though...

Wondered about just putting a marine enamel...
__________________
karma is offline   Reply With Quote
Reply

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
'Practical Sailor' - Best Ablative Bottom Paint ? KevinE Construction, Maintenance & Refit 23 02-04-2015 13:35
Advice on Using International Uni-Pro Ablative Bottom Paint nelson.peter Construction, Maintenance & Refit 6 12-04-2010 03:43
Is that a Hole Below the Waterline? Waterborn Monohull Sailboats 1 17-06-2009 06:10
Ablative bottom paint shelf life jwaring1 General Sailing Forum 6 15-01-2008 06:08



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:09.


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.