

Good afternoon,
I am preparing the external underneath of my verandah to paint. The exposed board in fibre cement sheeting, and some of the older ones may possibly by asbestos, which I am not removing.
I have scrapped off the loose paint, and now believe I a need to prepare the bare patches with a patching compound? Is this correct, and which one would be most suitable for external fibre cement sheeting and asbestos?
The 2nd picture shows some gaps in the timber which I am also going to seal up, would I do this with silicone - and which one would be best to use?
Many thank in advance for any assistance.
Regards
Sally