Reply
 
Thread Tools Search this Thread
 
Old 10 August 2010, 07:56   #1
Member
 
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 2,691
Coating ply - paint/varnish/gelcoat?

Just need some advice please on how best to protect and finish bare marine ply for a couple of small projects - locker and a seat base. Locker will be wet often, seat just splashing rather than immersion.

Doesn't need any addred strength of GRP just the waterproofing. Ideal finish would be grey and possibly non-slip. Simple/budget method preferred.
__________________

__________________
Max... is offline   Reply With Quote
Old 10 August 2010, 09:56   #2
Member
 
Country: UK - England
Town: Chichester
Length: no boat
Join Date: Oct 2003
Posts: 215
Quote:
Originally Posted by Max... View Post
Just need some advice please on how best to protect and finish bare marine ply for a couple of small projects - locker and a seat base. Locker will be wet often, seat just splashing rather than immersion.

Doesn't need any addred strength of GRP just the waterproofing. Ideal finish would be grey and possibly non-slip. Simple/budget method preferred.
This is probably your most cost effective method sealing and waterproofing plywood. You just paint it in, let it dry, sand smooth, prime and then paint.

http://www.marinemegastore.com/produ...AQU_Q05170.htm

Cheers
__________________

__________________
Stephen-RIB is offline   Reply With Quote
Old 10 August 2010, 10:07   #3
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Flocoat with a small foam roller. Two coats will look superb.
__________________
Mollers is offline   Reply With Quote
Old 11 August 2010, 02:52   #4
Member
 
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 2,691
Thanks chaps.
__________________
Max... is offline   Reply With Quote
Old 14 August 2010, 00:53   #5
Member
 
Country: USA
Town: Houston, TX
Boat name: Lady Ashley
Make: Avon SR 5.4
Length: 5m +
Engine: 70 Merc 2S
Join Date: May 2008
Posts: 96
A lot of guys on some of the wooden boat builders websites are big fans of shellac. It dries superfast, waterproofs nearly as well as polyester resin, won't laminate like polyester, and is a great primer for all kinds of paint.
__________________
jefflee2k is offline   Reply With Quote
Old 14 August 2010, 03:52   #6
RIBnet supporter
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,803
As stephen said:

http://www.cfsnet.co.uk/cgi-local/sh...#aUDAG4D_2d001
Attached Thumbnails
Click image for larger version

Name:	460.jpg
Views:	152
Size:	4.7 KB
ID:	53433  
Jizm is offline   Reply With Quote
Old 14 August 2010, 05:43   #7
Member
 
Country: UK - England
Town: I.O.W/Bristol
Boat name: HotShot
Make: shakey
Length: 5m +
Engine: 70hp Tohatsu
Join Date: Jul 2003
Posts: 1,543
Quote:
Originally Posted by Mollers View Post
Flocoat with a small foam roller. Two coats will look superb.
Mollers, have you done this? If so, have you had any problems with cracking? When I did my consoles and seats, I coated all the bare wood in 2-3 coats of neat epoxy. I was wondering the other day why I hadn't coated it all in nice thick flocoat but I came to the conclusion that the flocoat, when set is not flexible and so would be prone to cracking under expansion and contraction of the wood. Epoxy allows the wood to breathe and expand. This could be a load of crap, but I'm sure this is what I was advised at the time.

Cheers,

Tim
__________________
slimtim is offline   Reply With Quote
Old 14 August 2010, 05:54   #8
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Yeah, I re-made the transom plate for the Searider. It made for a very smart job. There's a big difference between purely coating ply and glassing over ply. If the ply involved is in anyway structral of liable to flex, it'll need to be glassed-in not just flocoated.
Attached Thumbnails
Click image for larger version

Name:	SR4 Frame 004.JPG
Views:	232
Size:	80.5 KB
ID:	53435  
__________________
Mollers is offline   Reply With Quote
Old 14 August 2010, 05:56   #9
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by slimtim View Post
Mollers, have you done this? If so, have you had any problems with cracking? When I did my consoles and seats, I coated all the bare wood in 2-3 coats of neat epoxy. I was wondering the other day why I hadn't coated it all in nice thick flocoat but I came to the conclusion that the flocoat, when set is not flexible and so would be prone to cracking under expansion and contraction of the wood. Epoxy allows the wood to breathe and expand. This could be a load of crap, but I'm sure this is what I was advised at the time.

Cheers,

Tim
My anchor locker was done like it (2 coats of flowcoat only). It cracks when it flexes (as Mollers said above)-mine is falling off in lumps and waiting for me to fix it. The Bonda G4 works well though but make sure it's in date and properly liquid when you buy it as it goes hard in the can.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 14 August 2010, 07:10   #10
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Wotcha need to preent cracking is 10-20% flexible resin added to your mix and wax to ensure the resin dries tack free. Wipe the ply with thinners to degrease its surface. It's equally possible to use just flexible resin but it's slightly soft, not squidgy soft but just not so hard. None of these surfaces is grippy tho, they're actually quite slippery.
__________________

__________________
JW.
jwalker is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 21:57.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.