Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Bodywork and interior
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 24th September 2012, 09:50 PM
Johno's Avatar
Johno Johno is offline
Senior Member
 
Join Date: Sep 2011
Location: Lutton (East Anglia)
Posts: 497
Default Cutting GRP

Well I've not worked with GRP before so I'm not sure what is the best method to cut the hole out in my nosecone





Also if I make a mistake how do I repair the gelcoat?
__________________
Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction.
Albert Einstein

http://s1199.photobucket.com/albums/aa472/JohnoSS1/

Johno
Reply With Quote
  #2  
Old 24th September 2012, 10:21 PM
wylliezx9r wylliezx9r is offline
Senior Member
 
Join Date: May 2010
Location: South Wales
Posts: 321
Default

Slitting disc on an angle grinder. Then tidy up with a sanding bit on a Dremel. Well that's howi did mine. Horrible stuff to cut mind you, make sure you wear a mask
Using above method I didn't damage any gel coat, obviously cut from the gel coat in.
Reply With Quote
  #3  
Old 24th September 2012, 10:24 PM
wylliezx9r wylliezx9r is offline
Senior Member
 
Join Date: May 2010
Location: South Wales
Posts: 321
Default

Which body work is that by the way?
Reply With Quote
  #4  
Old 24th September 2012, 10:26 PM
robo robo is offline
Senior Member
 
Join Date: Jun 2011
Location: scabs
Posts: 1,722
Default

The method I use on f/g is to mask up the area to cut and mark your lines on the masking tape. Cut the f/g with a cengar saw http://www.cengar.co.uk/pages/e-range-JP901.html leaving about 3mm from the finished line and dress the cut back with one of those sanding rolls http://greens-garage.com/images/drumsander1.jpg working along the length of the cut being carefull not to flick the gell coat off by turning the drum roll against the line. Works for me. have a couple of practice stabs at it in the middle of the panel thats coming out.

Bob
__________________
When The Results Disagree With The Theory: Believe The Results And Invent A New Theory
If I had two brains I,d still be a halfwit

The cave http://s1116.photobucket.com/user/my...deshow/mancave

The build http://www.haynes.co.uk/forums/showthread.php?t=12669

Last edited by robo : 24th September 2012 at 10:30 PM.
Reply With Quote
  #5  
Old 24th September 2012, 10:27 PM
TSM Locost's Avatar
TSM Locost TSM Locost is offline
Senior Member
 
Join Date: Mar 2007
Location: Wisbech
Posts: 423
Default

Done a search on LCB, general opinion seems to be, Jigsaw with very fine blade, Dremmel, powerfile, some say angry grinder :-(

Just found this, use a jigsaw fitted with an abrasive blade, (not a saw blade).

Whatever you chose protect with loads of masking tape.

Must pop round one day.
__________________
Be Lucky, Mike.
Reply With Quote
  #6  
Old 24th September 2012, 10:55 PM
SeriesLandy's Avatar
SeriesLandy SeriesLandy is offline
Senior Member
 
Join Date: Nov 2008
Location: Portsmouth
Posts: 828
Default

I used an angle grinder with a 1mm slitting disc. Worked fine for me. Also cut from the gel coat surface and a bit of masking tape will help.
Also to cut a perfectly straight line I clamped a cheap steel rule(wilkinsons 40p ish) and cut against it with the grinder.
__________________
Steve
My Photo Album | Haynes Roadster FAQ | IVA Forms How To

Last edited by SeriesLandy : 24th September 2012 at 10:59 PM.
Reply With Quote
  #7  
Old 25th September 2012, 01:13 AM
baz-r baz-r is offline
Senior Member
 
Join Date: Nov 2009
Posts: 1,464
Default

grit face jigsaw blades work well, use an old hoover to stop dust going everywhere, i find for afterdark jobs a humdrum hacksaw is quiet cuts well and no chipping if you keep the angle low.
Reply With Quote
  #8  
Old 25th September 2012, 07:51 AM
Wynand's Avatar
Wynand Wynand is offline
Senior Member
 
Join Date: Nov 2010
Location: South Africa
Posts: 173
Default

Quote:
Originally Posted by SeriesLandy View Post
I used an angle grinder with a 1mm slitting disc.
+1

Never try to wipe the fiberglass dust off you with hands or rag Use compress air...
__________________
Cheers

Wynand
http://5psi.net
Reply With Quote
  #9  
Old 25th September 2012, 09:37 AM
robo robo is offline
Senior Member
 
Join Date: Jun 2011
Location: scabs
Posts: 1,722
Default

Dont forget the dustmask and protective goggles , if you can get one of those all in one paper overalls with the hood even better. The stuff is an irritant.

Bob
__________________
When The Results Disagree With The Theory: Believe The Results And Invent A New Theory
If I had two brains I,d still be a halfwit

The cave http://s1116.photobucket.com/user/my...deshow/mancave

The build http://www.haynes.co.uk/forums/showthread.php?t=12669

Last edited by robo : 25th September 2012 at 09:44 AM.
Reply With Quote
  #10  
Old 25th September 2012, 10:35 AM
MikeB MikeB is offline
Senior Member
 
Join Date: Apr 2007
Location: Nr Wellingborough
Posts: 512
Default

cutting with a short sleave t-shirt on was a bad idea, it does itch a bit!
Good to see another AGM bodied car coming on.
I've not cut my nose out yet but did the side and back panels with a angry grinder.
Did you get teh AGM side panels BTW?
__________________
Build Cost so far £xxx (Given up adding it up) - She Starts!! Build Thread Here:
http://www.haynes.co.uk/forums/showthread.php?t=5501
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 02:23 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.