Have cleaned off loose/flaking white trim paint from the wooden edge
board and metal flashing and from underside of the two foot
overhanging soffits of our roof and now ready to repaint.
House roof is single storey low slope pitch and gravel and the roof is
62 feet by 37 feet; so we have some 200 lineal feet to repaint.
Fortunately everything can be reached from a short step-ladder, no
scaffolds!

In some places the original paint and previous repaints during last 39
years where paint was flaking have now been scraped and in places the
wood is bare. However most is intact but has become dirty. Previous
paint layer looks fairly glossy. Have checked that all ventilation is
OK and no signs of rot in the wood trim to be repainted.

Question: Should I now use say 'Alkyd' undercoat on the bare wood
patches, and then repaint all over with an alkyd exterior paint. I
understand 'alkyd' means what one would have previously called 'oil
paint' . It looks like it's going to be two coat job anyway. Once
that's been done and a couple of very small patches around two a
couple of windows the overlapping pine clapboard will be redone with a
new coat of redwood stain. i.e. Redwood house with white trim.

Repainting advice welcomed please.