George, when began our restoration of our WS42, Harmony, we looked at the sliding companionway hatch.  Harmony did not have a sea hood or turtle hatch and that was something we wanted:  (1) for protection from possible water ingress; and (2) to provide a stable location on which to stand when handling the mainsail.

The existing companionway hatch was messy looking with failing varnish, but the basic structure was sound and leak free.  Thankfully, we did not have to remove the hatch to revive its luster.  However, I agree that the teak beauty does take a bit of maintenance.

In order to minimize the maintenance, I stripped, replaced bungs, re-seamed the teak, and then finished the hatch in Sikkens.  Over the years and after several boats, we have made the move to Sikkens:  varnish is lovely, but the constant removal and 15 new coats is more than I have time for.

I applied 3 coats of Sikkens Natural Teak and then put 2 coats of Sikkens Gloss.  Each year we just update the Gloss for UV protection.  While not as hard a finish as varnish, it retains an attractive bright-work look that the Admiral and I like.

For the sea hood or turtle hatch, I fabricated a fiberglass lamination to match the cabin top angles and deck curvature.  I used Dan Spurr's book and numerous internet photos for the inspiration.  To be honest, I spent more time than I expected measuring angles and creating the mold than I expected. At the companionway end I added teak to match the companionway hatch.  I also created a flange through which to seal and bolt the structure to the cabin top.

Yes, it was a big item, but it has worked for the last couple of years.  It also provided a good surface on which to snap the dodger.

I understand your concerns about maintenance, but the look of the original teak companionway is wonderful connection to the aura of a Westsail.

Doug

I made a new turtle on my W43 George.  Was easy enough but the teak was pricey.  Good virgin teak of decent proportions is expensive.  I think if I had paid regular prices I would have went with Mahogany  costs a lot less but maybe less durable?

I have a canvas cover for the dribbles that occur if its raining hard or taking green on the deck.  I actually don't know the difference between the hatches on a 43 versus 42.

Dave, do you have any pictures detailing how the plexi mounts/slides? I would like to build something like yours for my boat. Some pictures from the entry side would be helpful 

Thanks in advance