There’s no gasket under the rear flapper window hinge, but should there be anything ? A dab of seam sealer to stop moister going in the screw holes ? Something to protect metal on paint ?

Same for the door striker plates (mk1). From memory there was some sort of goop under them but I cleaned them up long ago.

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1966 Mini Deluxe - “Gabby” 34 years under restoration and counting...
1970 MGBGT
1959 MGA

I put a little Sikaflex under mine.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Ditto drmini - I use a thin bead of Silastic on both. The door striker plate needs to be positioned to get a level gap for the door alignment and easy closing but over time it moves and trying to avoid stripping the screws/threads holding it, some sort of adhesive seems to help stop movement.