I didn't touch up any paint. The paint on mine was actually decent. It was the shellac that was terrible. The machine I have takes standard 15 x 1 needles. As for the bobbins, mine only came with one too. If you find out what they are and if they're still available, let me know.
I would be tempted to do a repaint on yours considering the paint loss. But the time involved in that is a big commitment.