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Drilling into gelcoat/fibreglass

Posted: Thu Nov 28, 2019 5:30 am
by Meneyin
I need to drill a run of 12 mm holes for lighting on my fly steps. Clearly this has the opportunity of getting messy, and splintering. What is the learned view of best way to minimise damage (apart from not doing it at all).

Re: Drilling into gelcoat/fibreglass

Posted: Thu Nov 28, 2019 6:39 am
by Roberta
I would use the correct size Forstner bit. It will cut the cleanest hole.

Roberta

Re: Drilling into gelcoat/fibreglass

Posted: Thu Nov 28, 2019 6:53 am
by Bill Edmundson
Also, tape over the cut before the cut.

Bill

Re: Drilling into gelcoat/fibreglass

Posted: Thu Dec 05, 2019 12:02 am
by TAB
If the surface is flat ish you could also use a router with a collet and the correct sized hole. Or a 12 mm plunge bit on a plung router.