>>1: Do the rudder hinges require further chemical treatment before fitting?
No
2: My inspector has warned me that the glass hides nothing, particulary
with regard to the lightening hole slots. Do you allow the
dry micro filler to partly/completely cure before spreading the slurry?...
No, make it thick enough so that it won't run
or is this not needed?
when you do the layup, scrape as much as
you can off the foam before applying the
glass.
If possible fill and sand as long as pssible before final painting. Even epoxy
shrinks a little. You are unlikely to see the lightening hole slots, but you
will see the ribs and spars after a year or so.
Graham
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