What is the best rotary tool bit for kayak plastic?

Glad to hear it worked well.  I used the same bit but kept getting melted plastic boogers ahead of the bit... must have been cheaper plastic.

That's interesting. Maybe I'm wrong that it's the type of bit. Could be the plastic or the speed. Hmmm... Well, research will continue next time I have to cut up my kayak 

I use this style cutter in various sizes.

I bought one of those too but since the first one worked I didn't try it yet. I appreciate the suggestion.

A rotozip has been a common tool in my work over the years yet I still am always very leery when using them on anything where a mistake can get costly.  They love to drift off on their own.   I rely on the base to help maintain some control.  I think Dremel has something similar for their tools don't they?       I will typically stay a small bit inside of my cut line then come back with a sanding drum on a Dremel to remove the remaining material right up to my cut line. 

Best tool is a very small jig saw. Dremel makes an attachment if you don't have a jig saw. I used the attachment a few times but a real jig saw is nicer if you can fit it in the area you want to cut.


Sent from my iPhone using Tapatalk

On my $1000+< kayak I'll cut it by hand I'm never in a hurry. To costly to run off course with power tools, it ain't like cutting a 2X4 the wrong length (cheap)

In the past I've used a Dremel, hole saw and spade bits; by far the cleanest way to cut a perfect hole in a kayak is with a forstner bit.

My friend Art, who is shown in the following picture, finds that a jigsaw works just fine on kayaks.

I should explain my previous post:  After many years of hard use, Art's kayak developed a crack on its bottom during a four day Selway River trip, so he retired it.  With a jigsaw.