House Paint in Thailand.
First I gave the rendered walls a rub down with No.4 sand paper.
Then concrete was undercoated with a white chalky acrylic finish before the color was applied.
The undercoat came in 20 liter drums and were able 1200 baht a drum.
This was the middle of the range price and the next up was much dearer.
This white chalky paint gave a good surface for the finishing coats.
I gave the white undercoat a quick sand paper rub before the final coats. More to come.