My house was reroofed 40 odd years ago and has asbestos soffits. They
have been painted with the pink masonry paint as used on the walls.
They have a tendency to flake over time (? masonry paint not
appropriate), but not everywhere.

I am currently painting the fascia, and am wondering whether it would
be better to:

1. Paint with masonry paint again over the existing paint after
scraping off the flaky bits.

2. Paint with masonry paint after sanding off all the old masonry
paint off first (yes, I know, very carefully, with full protection)
and ? using stabilising solution.

3. Paint over the masonry paint with white primer, undercoat and gloss
over the existing masonry paint after scraping off the flaky bits.

4. Paint over the masonry paint with white primer, undercoat and gloss
after sanding off the old masonry paint off first and ? using
stabilising solution.

All thoughts gratefully received.

Keith