What is it marks out a quality paint? Coverage, toughness, finish? Or a bit of everything?
This from Mylands brochure:
rich and highly pigmented eco friendly water based paints formulations which are easy to use with outstanding coverage and opacity and exceptional durability.
-superior quality raw ingredients such as marble dust and earth pigments in our signature marble matt emulsion. no low grade fillers or plastic bulking agents.
-the only premium flat matt with EN 133000 Class 1 Scrub Resistance Certification.
I think basically it looks better for longer. I have a sort of grudging respect for OCD obsession over quality (pace Beanieripper) : I got it over my yard, stressing out over the right colour of mortar, searching stone yards to get the right match for the existing stone etc. etc. . There so much mediocrity and shabbiness in the world, it’s nice to create some perfection/beauty especially when you’re living with it every day.
Notwithstanding all the above, I think primer, undercoat and at least two finishing coats is what really matters, whatever paint you choose. Could be an epitaph?