I have seen these SE sets before, they actually came with the coloured bottoms like that, it's not nail polish or paint. The #144 brush looks like one of Mac's older brushes, the print and size looks like my old, first Mac brush ever, the #266. Some of their brushes got new numbers and some were discontinued. I believe the consensus is that Mac SE brush sets have yet to be faked, the worry is really with the full-size brushes and full-size brush sets.