Hi! My favourite paint for nail art is the Nsi secrets prism paints -
http://www.nsinails.co.uk/content/prism_paints
They're really pigmented and are easy to use. The white with these is lovely.
I have a fine detail brush from
Moyra - I haven't used it yet but it looks really good. Here's link to their brushes -
http://www.moyrauk.co.uk/ourshop/cat_1257350-Art-Brushes.html
I will be using the brush today, so I can pop back on later and tell you what it was like.
Otherwise, I personally use a mixture of brushes that I have bought from different places. I have a set of nail art brushes from Poundland, they work fine. I also have a set from home bargains which work really well.
I also use this set from Amazon and this is my 'good' set, that I only use on clients, and that's because they are a tiny bit better than the cheaper ones, but at less then £4 you can't go wrong lol -
https://www.amazon.co.uk/gp/aw/d/B0...d=1496387706&sr=8-1&keywords=nail+art+brushes
They all work - but none of them have the tiny super fine brushes so that's why I bought the moyra one.
I also use a mixture of shop bought acrylic paints, I bought mine from the works. They work okay, but if you have a bigger budget, try a better brand. Sometimes the cheaper versions aren't pigmented enough. I work a lot with regular polish purely because it's quick to remove.
Here's a design I did using polishes and the brushes I mentioned (and some stampers lol!)