I used a jigsaw with a fine tooth blade. With a slow speed I cut the hatches with no problem and no chipping. Recently, I found a jigsaw blade designed for cutting laminates that has the teeth pointing downward. It cuts a nice smooth line on the saw side of the cut, but you've got to make certain you apply enough pressure to keep the saw down. It might be useful for cutting hatches as well.

> I'm at the point where I can cut through this pretty fiberglassed deck to
> install a hatch. Let me be the frst the admit that this scares me. Does
> anyone have any advice on cutting the hatch? What's the preferred method
> to cut the hatch out--jigsaw, skill saw (that's what I have), razor saw,
> etc. . .? Any help or advice (and lots of encouragement) is greatly
> appreciated. Lew