The trouble I have matching paints is that I have to get four or five because my ability to remember a shade in the shop is very poor... unless I have the thing with me... and a bike being wheeled through a department store or model shop isn't de rigeur.

Anyway, model paints with a moderately fine, pointed camel hair model paint brush and a few shades of silver paints should get you what you want. I've tried the nail polish route and actually recommended it, but it fades differently to the original paint.

I sympathise. I "fell" into a huge pothole in the rain uphill at 3.5km/h on my brand new Merida roadie -- three hours after picking it up. Fortunately, no damage was done except to ego.