I've decided to take the plunge and do the touch-up work on a couple of bikes that only have the odd nick here and there.

Any tips/suggestions? I'd like it to blend in as much as possible, so I'd like to avoid big ugly clumps of paint that look like it's been touched-up. How do I get it to blend in as smoothe as possible? Paint, sand, clear-coat? Some other technique? What do I use to apply the paint?

What about prep work?

Anything else I should be aware of/do when I do the touch-ups?