This would be my best guess for catalyzed varnish although you may end up doing the entire bulkhead(s) to get a homogenous finish. Start out working in an inconspicuous area to see how it's going to look.Benteteau recommends using a water based compound / polish, Aqua Buff 2000, from Hawkeye Products for polishing out light scratches and dull spots
I'm confused!Count me out. I can only deal with teak. Looks like the finish is catalyzed varnish and yet other here speak of oiling the surface which is incompatible with varnished surfaces. Who knows?
This would be my best guess for catalyzed varnish although you may end up doing the entire bulkhead(s) to get a homogenous finish. Start out working in an inconspicuous area to see how it's going to look.