Repairing a chip in a sink

Just finished fitting out the downstairs cloak. Cleaned it all up and there is a surface chip on the front on the sink…..arrgggh. Was so careful too, obviously not enough. It is tiny a few mill across and look like it’s just the surface finish. Initially I thought it was just a bit of dirt.

I’ve seen sink repair kits, are they any good? Am I likely to make it even more noticeable? Probably in a few weeks I will have completely forgotten about it, but it’s really annoying so if I can make i it disappear i would like to!

If you’ve repaired successfully and it looks virtually invisible what kit did you use?