I am refinishing a teak table for a sailboat, it was painted gray and I plan to refinish with varnish or similar so I can see the natural wood.  

I used Citrus Strip to remove the paint, and most of the paint came off, though there appears to be a grey film that cannot be sanded off.  Help, what do I do next to remove the grey film?

I’m reluctant to do much more, as I do not want to damage the veneer.

Thanks in advance

Michael Sanio