I love MAC Paint Pots, for one key reason: their staying power. They just don't budge throughout the day, and them when you go to remove it with a cotton pad and some remover - it just swipes gently away. Amazing.
I used to use Painterly as an eyelid primer, as I can get quite oily lids. I have since discovered better eye-specific primers, but I'll always have a soft spot for Painterly because I love the colour on its own, it totally glams up a natural make-up look.
It's easy to apply with a brush, but I also use clean finger tips.
I have this in Painterly and I use it ever day under eyeshadow. It's a miracle product, I have oily lids but with this there is never any end-of-day creasing or smudging. I'm definitely considering getting other colours to work with eyeshadow in different ways.