+1 on husker's tip.
I've used the "Paint to Fix" scratch/chip kit, and the colour match is dead on.
My A4 had a bunch of good sized chips on the hood that needed attention.
Step 1 -clean the area well, use a degreaser (brake cleaner works good).
Step 2 - use 1500 sandpaper to lightly go over the chip / scratch to make sure the edges are not too jagged
Step 3 - dab the match paint into the scratch/chip...fill it up so it is slightly above the good paint. Several passes/coats/dabs may be needed to fill it. Leave it alone for a couple of days to fully cure and flash off. (you don't add hardener to this stuff)
Step 4 - using a sanding block with 1000 wet sand, 1500 wet sand, 2000 wet sand, gradually fan out. Light, FLAT pressure, lots of soapy water, rinse often. This will level the paint in the chip / scratch to the rest of the panel. Be CAREFUL...the factory clear is thin, plus its 20 years old. You don't want to burn through it.
Step 5 - Get some 3M or Farecla compound...buff, buff, buff. Note: when using Farecla especially, keep the cloth/pad moist as it really cuts sanding scratches.
Step 6 - polish the area...then polish the whole panel.
Step 6 - wax her up and crack a beer and admire your work
DISCLAIMER: I'm not a doctor, nor did I stay at a Holiday Inn Express last night...results may vary as husker says. Just my method.