I now have the acrylic cut. Not a light brown tint. I had two choices - near black or clear. I am putting in acrylic doors to let in the light (I can't tolerate gloom any more than washboards), so went for clear. I don't really care all that much if someone can see in when the light is on.
Have you ever seen how they put the smooth, transparent finish on the cut edge? I was gobsmacked when I saw how it was done. Your mannie picked up the cut sheet and wandered across the workshop to two gas cylinders. He turned on the oxygen and he turned on the acetylene, lit the torch and calmly played it along the cut edge without scorching the protective paper, producing a perfect smooth, transparent edge. He had an understandable smirk on his face while he did this.
The cockpit has a chichi teak overlay on it, which I love. So I went to all the trouble and (no doubt. waste of) time to chisel out some of this so that I could put down a mitred cross piece, so that the little bulkhead does not look like an afterthought. Fantail, being Fantail: one side of the cockpit was slightly concave and one side slightly convex. My ideas of filletting in the bulkhead were rudely shattered when, once covered with slippery epoxy, one end of the bulkhead kept moving out of place. So I quickly cut up some framing (without, I'm ashamed to say, benefit of the 5 degrees or so of angle it should have had) and screwed and glued that in so that I could fit the bulkhead. Amazingly it ended up level (athwartships. Hopefully it will drain over the aft end). Or at least it the spirit level looked the same whether laid on the original bridgedeck or my new one.
The framework is not as straightforward as I'd thought, but no-one - least of all myself - will be surprised to hear this. I am slowly but surely working my way to the appropriate solution. Am presently sitting in a draughty cabin, hoping it doesn't rain, while the bottom washboard starts its transformation into bulkhead/sill!