Reply
 
Thread Tools Search this Thread
 
Old 18 June 2013, 08:40   #1
Member
 
ajstars's Avatar
 
Country: UK - England
Town: Horley
Boat name: Pending!
Make: Cobra
Length: 7m +
Engine: 225hp Outboard
Join Date: Jul 2012
Posts: 368
Gelcoat?

Managed to chip the gelcoat down to the glass fibre on our orange Humber. What's the best way to fix it and if I'm adding colour to a gelcoat mix or plastic padding then what do I use as the colour?
Thanks
__________________

__________________
ajstars is offline   Reply With Quote
Old 18 June 2013, 09:01   #2
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Ideally I'd contact Humber, and see if it's possible to buy a small amount of gelcoat from them. Don't bother with flowcoat, just build it up in layers till it's proud of the surface, and cover the last coat with sticky tape. Once it's hardened, sand it smooth with 320, and then polish it. Job done!
__________________

__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Old 18 June 2013, 09:29   #3
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 Dirk Diggler View Post
Ideally I'd contact Humber, and see if it's possible to buy a small amount of gelcoat from them. Don't bother with flowcoat, just build it up in layers till it's proud of the surface, and cover the last coat with sticky tape. Once it's hardened, sand it smooth with 320, and then polish it. Job done!
Dirk, silly Q, but what brand of sticky tape areyou using?
I tried using B&Q sticky tape. The damn stuff seems to weld itself onto GRP, and tears into little bits as it comes off, then the remaining glue gums up the sandpaper.

Ended up grinding it off and redoing with wax in the last coat, then removing the wax with acetone before sanding/polishing.


If there's a particular brand that doesnt' frag itself, I'd appreciate knowing as it's far easier not using the wax.
__________________
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 18 June 2013, 09:58   #4
Member
 
lakelandterrier's Avatar
 
Country: UK - England
Town: Gloucester
Boat name: Lunasea
Make: Ribcraft
Length: 5m +
Engine: Suzi 140
MMSI: 232005050
Join Date: Sep 2007
Posts: 1,126
I've noticed a couple of small chips maybe 5mm in diameter- but deep enough to expose the GRP on mine. They are under the transom, so I'm assuming stone chips from towing.
Standard white hull what's the best / most straightforward stuff to fill them with, bearing in mind patience and craftsmanship are not my strongest points?
__________________
Member of the Macmillan Round the Isle of Wight Club
lakelandterrier is offline   Reply With Quote
Old 18 June 2013, 10:17   #5
Member
 
Wightdiver's Avatar
 
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 434
Quote:
Originally Posted by lakelandterrier View Post
I've noticed a couple of small chips maybe 5mm in diameter- but deep enough to expose the GRP on mine. They are under the transom, so I'm assuming stone chips from towing.
Standard white hull what's the best / most straightforward stuff to fill them with, bearing in mind patience and craftsmanship are not my strongest points?
If it is white buy a tube of Gelcoat Filler made by plastic padding, should be available from any chandlers. Easy to use and leave a good finish.

Andy
__________________
Wightdiver is offline   Reply With Quote
Old 18 June 2013, 12:39   #6
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Quote:
Originally Posted by Nos4r2 View Post
Dirk, silly Q, but what brand of sticky tape areyou using?
I tried using B&Q sticky tape. The damn stuff seems to weld itself onto GRP, and tears into little bits as it comes off, then the remaining glue gums up the sandpaper.
I use something called "flash breaker tape", but it's 28.00 a roll, heat resistant and very slippery. I've had good results with normal brown parcel tape, though you need to buy a decent one, otherwise sello or scotch tape works ok.

If it's a big repair, then a sheet of acetate works well, and so does spraying a coat of PVA over it.
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Old 18 June 2013, 13:35   #7
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
PVA is a good tip, cheers!
__________________
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 19 June 2013, 16:38   #8
Member
 
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 896
Or hairspray ? Never tried it myself but if it can be used as mould release, guess it can be used as air blocker on gelcoat also?

WEST SYSTEM - Projects - Mold release, PVA and hairspray
__________________

__________________
fun on a boat is inversely proportional to size...sort of anyway
C-NUMB 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 10:56.


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