Anyone used ocean-rated yacht hatches: replace the RV scrap?

Hi Guys:

Sleepy makes a very good point. With the screen in place, you need to push the hatch open with your hand (there is no crank), and re velcro the screen. Out 1000 kilometers off-shore, there aren't too many bugs!

I'd (personally) wouldn't be averse to treating the screen with Permanone (a very long-lasting broad-spectrum repellent).