I have been asked to paint a room with a paint that has no or low VOCs (volatile organic compounds) such as the Dulux Ecosure paints.
I was originally planning to use a plain white paint as the first coating to give me a clean, uniform surface to paint on with the new colour (I'll probably still do two coatings of the new colour). Would it defeat the purpose if I didn't use a low-VOC undercoat or is it the top coats that matter (the purpose being better air quality, in case it wasn't clear)?
Dulux actually sells an Ecosure undercoat (https://www.duluxtradepaintexpert.co.uk/products/picker#details/dulux-trade/ecosure-undercoat), which is why I started wondering if I need to worry about more than the top coatings.
More background info: the room is in a 20-year old house, though I'm not sure when was the last time it was painted. It currently has some stains and dirt on the walls, and I already fixed some cracks and holes with plaster (so it definitely needs some sort of paint job).