Hi, I have a small chip on the barrel of my Jinhao X250 fountain pen. The barrel is metal with a deep red and black finish. What would you folks use to touch up the chip/scratch ? Nail polish, touch up paint for cars ? Especially want to hear from those who've fixed this sort of thing in practice. Having said all this, it might be more economical to buy another pen, since they're AUD $3.49 with free postage. This is the model: