I'm pulling the two portlights in our transom to correct some seepage but have a question re the two pins holding the plastic window portion. The pins have holes down the center and at first I thought they might have had hex-heads and unscrewed but it doesn't appear that way. I tapped on them but they didn't move. Before I tap a lot harder, I just thought I'd ask if that is the proper method...

Just a side note, the plastic "windows" were opaque yellow-orange and I thought they were supposed to be that way. But a friend at the marina said they will polish clear with regular plastic polish. I said, "No, not these." But I was wrong - in 20 minutes I had windows that I could see through for the first time since we have owned the boat (6 years).