OK, I got some paint and the colour match is great. The only thing that wasn't spot on was that I guessed at matt, but at some angles it looks like a satin (if it's available) or maybe even a gloss would have been better.

Here's the stuff.



I think it was about �8.50 for the can. The supplier is on the label.

Too early to say whether it'll stay on through one wash without etch primer, but colour-wise I recommend it. I sprayed one patch the size of a halfpenny, and dabbed a few spots with a cotton bud. Both matched well enough to not be noticed if you didn't know they were there.