5 replies to this topic

[Tomf]

Well im been offered a carbon fiber bonnet, but the paint has splintered, so im guessing this is down to a problem with the gel coat that has then effected the outer pain....

So my question is what is the cure to this problem? would i just rub it back and paint as normal, or will the splinering just re-occure?

[pantera2075]

Proper etch primer is required, otherwise paint won't stick properly to laminates.

[Tomf]

No its not that its the gel coat that has cracked and this has caused the paint to crack.... Etch primer was used.

[pantera2075]

I've not come across carbon fibre with a gelcoat, but gelcoat crazing is common in GRP - my bonnet below has some of the cracks ground out, but many still to go.

you need to grind off the offending gel areas and reapply or fill.

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[Tomf]

Cheers, so it would need to be taken back to before the gel coat and then filling, then painting.

[pantera2075]

Pretty much yes, but it's a good idea to grind down, one new layer of fibre and resin, then a slight skim of filler over the top - this way, if the crack goes into the fibres it gets sealed back in.