Would also be interested to hear people's experiences - on the really small ones, I use a cocktail stick dipped in the touch up paint as the brushes are way too big. For larger ones, I have some very fine-end brushes so again, dip that in the touch up paint. That was on my WRX - haven't got any before and after shots since moving to Audi S3 but being Navarra Blue I've already got the paint !