Diamond Sea Glaze are the best sliders out there, they are not cheap
. They can build to the size you need. Plexiglass windows can be restored, they do it on airplanes all the time. My son in law used to own a company that does it. What is your location?
If you are talking the teak floors, try a good cleaning
with regular house hold floor cleaning
supplies (not the kind that "auto wax" for vinyl etc) then you can assess the condition. Joy works great, TSP works greater but is enviro bad and you need gloves.
If you are talking bulkheads etc, take the time to clean it all with vinegar and water
or your favorite solution. Then you can assess what it needs better. If it was varnished not oiled, you need to determine if the wear and tear has gone through the last bit of varnish
. if there is exposed raw wood or grey marks, then this has occurred and you might have to spot stain/match prior to proceeding. If it is just dull etc, light sanding
and recoating with a good varnish or polyurethane
(one part) will make it look nice. If it looks like it was just oiled, clean as above and reoil it. I have sucessfully used Daly's Sea Fin Teak Oil
over old interior
varnish and it worked quite well. It is a kind of sticky oil
, appears to be almost an oil/varnish mix... Pictures would help... Where were the defever's built? if Taiwan
, the interior
may be lacquer....