Cutting fiberglass - SailNet Community
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post #1 of 4 Old 07-19-2006 Thread Starter
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Cutting fiberglass

We have bought new ports for our boat. There are two sizes but the larger one is a little bigger than the actual cutout for the old ports. I was just wondering what is the best tool to use for cutting the openings a little larger. There is also a curved spigot in the new ports that wasn't there before. Thanks!
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post #2 of 4 Old 07-19-2006
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I've had good results by using a reciprocating jig saw with a fine tooth blade. Be sure to protect the gelcoat by applying a wide masking tape border to the gel-coat surface, before marking the cut. Naturally, the interior finish needs to be considered as well.

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post #3 of 4 Old 07-19-2006
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Spiral cutter (Roto-Zip) is another good option. But do use tape to protect the gelcoat from chipping and scarring.
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post #4 of 4 Old 07-19-2006
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1. Tape the finished side before you cut, no matter what you use to cut it

2. Draw a line just shy of what you need. You can cut to there and then cut a bit more where needed.

3. I've finished cuts with a dremmel or similar tool.
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