Frank, The handle ends could be dipped in that rubber type coating you see used to dip the handles of tools in, like pliers and such, after you pant, galvanize, or chrome them. You can usually find a quart can of that product in your local hardware store. I'm not to worried about adding collision protection bars on my metal hatch viewport, since it's small and will be much thicker then needed, as well as be a conical type. I will also have a very gradual curve to all the viewport seat surfaces that protrude above the hatch head surface for good hydrodynamics. Regards, Brent Hartwig
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