you got the same repaint related problem like me,
i cover it with 1 layer of nippon matex ,  but another layer is needed to completely cover it,
the rest of the wall, not yet done, an paint expert uncle suggest us put sealer 5400 before color paint, we makan the word he say ' it will last longer' because we lazy to repaint it after a decade or so...
some sifus here suggest that good wall without chalking feel can just paint with matex or maxilite , if you got the budget then (expensive ) sealer will also do
i learnt a lot bout paint here! so graceful

Hi Bro, thanks bro, just want to ask after first coating 1 layer only? and paint nippon/dulux 1 layer? enough to cover up the dark wall?
but i saw some video paint 2layer of nippon/dulux permanent layer to cover the dark wall. sifus please help us....

hi all sifu, can i use nippon paint sealer with jotun topcoat? or need to use same brand for both?

because i want to repaint outdoor fencing, so better to use sealer
from my survey found out that nippon paint sealer is cheaper and jotun topcoat is cheaper, so i am thinking these two use together can last long or not...

for indoor i use sealer for lately done plaster ceiling, my contractor said will have some powder drop off after few years if dont use sealer. other repaint wall and ceiling  all i use nippon maxi white RM75/drum

means that i just wash the fencing then just apply the topcoat on it will do? if like that i can save alot of time
i am thinking to use jotun antifade, say can last for 8 yrs...