A portlight is a porthole designed to let in light ...from the sun (or a
curious neighbor's flashlight). It's not a light fixture.

Brian D



"Keith" wrote in message
...
I guess your boat is trailerable? What kind of lights are you talking
about,
navigation, courtesy, etc.? If this appears no matter what, you might be
seeing "blooming" where additives in vinyl plastics come to the surface. I
kinda doubt the lenses are made of PVC though, although that's all I can
imagine. UV degradation wouldn't polish off, so you've got some sort of
contamination on the surface. Try spraying with a little Pam or silicone
spray after you clean them next time.

--


Keith
__
When the chips are down, the buffalo is empty.
wrote in message
om...
I have long been curious as to why the polymer lights on my boat
become cloudy relatively fast, whether near the sea or not & whether
under cover or not. It polishes off fine with a bit of work, but I
never see this occur in other acrylic or lexan windows I have around
my place, and it is a minor annoyance. Is there one particular type
of clear polymer which clouds up like this? If left for months, they
will become only translucent until repolished.