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  #1  
Old 24th September 2012, 09:50 PM
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Johno Johno is offline
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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?
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Old 24th September 2012, 10:21 PM
wylliezx9r wylliezx9r is offline
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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.
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Old 24th September 2012, 10:24 PM
wylliezx9r wylliezx9r is offline
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Which body work is that by the way?
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Old 24th September 2012, 10:26 PM
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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
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Last edited by robo : 24th September 2012 at 10:30 PM.
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Old 24th September 2012, 10:27 PM
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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.
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Old 24th September 2012, 10:55 PM
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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.
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Last edited by SeriesLandy : 24th September 2012 at 10:59 PM.
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Old 25th September 2012, 01:13 AM
baz-r baz-r is offline
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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.
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Old 25th September 2012, 07:51 AM
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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...
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Old 25th September 2012, 09:37 AM
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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
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Last edited by robo : 25th September 2012 at 09:44 AM.
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Old 25th September 2012, 10:35 AM
MikeB MikeB is offline
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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?
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