can you repair a chip on a Belfast sink

[sacbina]

only about 3mm but it's on the rim???
If so, what with?
if not, will it effect sink ?

thank you

here's a link to a kit for repairing sinks,If it's a really deep chip fill it with car body filler and then use the enamel supplied in this kit to restore the color

www.plumbworld.co.uk/scratch-chip-repair-kits-1845-0000

thank you