Want to seek advice. I'd had leaking and termite issues previously which had damaged some of my internal paint. Its sorted now, and after a very long time finally decided to fix repaint walls and replace skirting to pvc.
Question, the leak had quite a damage as per pctures. It flake the paint and i had scrap whichever portion i managed to. Evwn the undercoat or sealer was also easily scrap out which leaves a thick layer between the ok portion and bad portion.
I will later try to sand the area between the ok and bad ones to leave as smooth as possible finish between those.
Question, to fill the gap between the ok part and bad part, what is best material? I experimented putty fill (liquid type) but its hard as it cant coat thick layer. Would a normal paste putty filler does the job or there are better options?
And assuming if i manage to fill with putty and sand it to level, would i need primer or sealer on the repair part? Iplan repaint the whole wall, would there be visible mark on the repaired portion?

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How much does it cost roughly to repaint a 22x75 double storey house internal and external including labour in Selangor? Assuming normal nippon paint.