I've been redoing my utility room recently and a couple of my new units had some damage, but had been in boxes waiting to be fitting for too long (me drilling the holes in the wrong place for a handle won't have helped either), after a google search, I came across these touch up pens that sounded perfect to fix the issues
The first pen I got seemed ok, but after waiting for the paint to dry, it clearly wasn't a good match and was a couple of shades lighter than the unit. I then sent a mail for advice late one evening and had a reply pre 8am the next day saying it wasn't normal and they would look in to it. By lunch time the same day, a new pen was shipped and it turned out to be the perfect match. I'm pretty sure the manufacture had changed the colours of the units, so it was understandable the original match wasn't good, but the company went the extra mile resolving the issue and getting me the right match