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Coupe - Cracked bonnet/gel coat 
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Joined: Tue Nov 09, 2021 12:01 pm
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Post Coupe - Cracked bonnet/gel coat
Hi,

Whilst cutting a hole in my coupe bonnet for a fuel cap, the bonnet split! Damn!
Does anyone have any tips or recommendations as to how to fill the crack before a respray? Normal body filler?
Also, has anyone strengthened the bonnet with this sort of penetration??
Thanks!
Ken


Tue Nov 15, 2022 12:12 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Ken is it a gelcoat crack or crack right through if you post a pic it would help for people to give advice. Normal body filler on its own will be no good it will crack out again


Tue Nov 15, 2022 5:59 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Hi Elansprint!
Many thanks for your reply. Hopefully these pics will show it.
It looks just like the gel coat.
Cheers


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Wed Nov 16, 2022 8:30 am
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Post Re: Coupe - Cracked bonnet/gel coat
To be safe I would add a couple of extra layers of CSM and resin underneath the crack to prevent flexing then open out the gel coat crack to about 6mm wide using a Dremel or die grinder then fill it with a fibre reinforced filler before sanding and re-finishing.

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Thu Nov 17, 2022 8:44 am
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Location: Kano north Nigeria
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Post Re: Coupe - Cracked bonnet/gel coat
Apart from the crack it does look pretty


Thu Nov 17, 2022 10:57 am
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Post Re: Coupe - Cracked bonnet/gel coat
That sounds great advice, thanks very much. I’ll get on the case?
Cheers :)


Thu Nov 17, 2022 10:58 am
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Post Re: Coupe - Cracked bonnet/gel coat
What a lovely car - it makes me want one!


Thu Nov 17, 2022 12:26 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Thanks guys! It finally got approved to drive on Australian roads and I picked up my registration plates last week! Yay!
:D


Thu Nov 17, 2022 2:46 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Ken I agree with gtm driver above couple of layers of csm on the back then grind out crack on top into a V extend 15mm past end of crack i would then use a layer of gf tissue to cover the whole ground out area so it bonds whole surface together then build up with gf then flat to profile a skim of filler is acceptable but just remember it can sink


Thu Nov 17, 2022 6:42 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Thanks Elansprint! That sounds the way to go and I appreciate your advice.
Hope I can nail it!! :shock:


Fri Nov 18, 2022 9:44 am
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Post Re: Coupe - Cracked bonnet/gel coat
Ken it is not difficult just messy and time consuming to build up the layers there is a book by miles Wilkins on fibreglass he is regarded as the guru in lotus circles good reading if you can find a copy


Sat Nov 19, 2022 5:27 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Ken here you go
https://www.ebay.co.uk/itm/334627689694 ... media=COPY


Sat Nov 19, 2022 5:31 pm
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Post Re: Coupe - Cracked bonnet/gel coat
Hi Elansprint!
Thanks very much for that. I’ll try and get a copy.
Cheers


Sat Nov 26, 2022 8:44 am
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