>>5486555I did a basecoat of Mr Super Clear for some tooth, then I used a small stiff bristled paint brush and swiped it along a pastel stick. I followed the flow of the hair, if that makes sense. If I get too ambitious and need to tone it down or smudge color in the wrong place, I use a kneaded eraser to correct it. When satisfied, another layer of MSC, then details.
Helps to test on a chunk of runner first.
The brush I used is only 5mm wide and is pic related. (The lacquer on the handle got fucked up when my brush cleaner leaked.) Hope it helps.