Hi Dave, I used 6mm acrylic with a light bronze tint when I did mine this spring and it matched the original perfectly. It is my understanding that the UV and scratch resistant polycarbonate get those added properties from coatings applied to the surface and that these coatings don't last that long. Also I believe that Lewmar used acrylic on their hatches but it is much thicker, somewhere around 12mm.
Morgan Ellis 30-2
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