https://www.ebay.co.uk/itm/BMW-MERLOT-RED-MET-PAINT-CODE-A02-TOUCH-UP-SCRATCH-REPAIR/371796238475?hash=item5690c8608b:g:ma4AAOSweM1Z7xsc
I've used the above before on a metallic black Audi and just received some for the Zed. Worked really well on the audi, has the lacquer already mixed in so no top layer of lacqeur required and a good shine is achieved.
For paint chips apply with a really fine paint brush not the one the paint pot contains. Leave for a few days to cure, wet sand and then polish either by hand or machine. This is gonna sound odd but I paper punch some 600 grade wet and dry and super glue the round piece onto the end of an eraser pencil. The rubber end is small and forgiving and you can accurately sand the paint in the chip down to the correct level without sanding surrounding paint. I then machine polish with Menzerna super finish 3500, which can be bought at polishedbliss for £10.50 with freepost, the best polish I have used with a DA.
Post some before and after pics for which ever solution you choose to use!