Some time ago I spent £32 on a soprano uke by Stagg.
Not the greatest instrument in the world but a great test bed for improvements.
I ordered some machine heads from Hong Kong via eBay and a set of Aquila Nylgut strings:
Whip off the existing rubbish machine-heads and fit lovely Gibson style versions:
I had to drill the post holes out to 8mm so the ferrules fit.
A moment's inattention, a slip with the drill and I scratched the logo on the headstock.
No problem I thought, I just use a razor blade to clean the rest of the logo off and all will be well.
Any cosmetic advantage the lovely new machine-heads bestowed has been ruined.
Fortunately I do have something in a tin that will restore the colour, if only I could remember where I put the tin.
I added a jolly paper label to the interior: