Paul, I have seen several -10s with nothing but paint on the door hinges. They really don't look bad at all. I fabricated some covers out of .032 and threaded two holes in the hinge half for a 4/40 CS screw to hold them on. It still leaves easy removal.
As for the Seat belt attach point. I would not glass over it. Someday it might have to be removed and it would then be a major hassle.
I am regretting having fiber-glassed my HS and VS tips for that exact reason. If one gets damaged, then I am painting the whole surface.
Now on the other hand, if you are building a show plane, go for it!