It's happened to every collector once or twice. Either a figure fell and broke or you bought something and it's either broke, damaged, or you planned to fix it myself. This just recently happened to me. I found my last missing Bandai Creation 6" figure, the '93 MechaGodzilla. Because it was only ever released in Wave 2, it's become a bit rare. Most sell extremely overpriced now, even ones not in mint. I got a used one in a figure lot for a measly $13.
The problem...
To say it had its paint problems is an understatement. It was obviously banged around.
And it had several paint scrapes of various colors.
I sighed at first when I realized the extent, but figured it was better than nothing and would do for the time being. Then, at work, we were given some new sharpie markers to repair similar colored problems on our resin cabinets. I had the idea to try it out on MechaGodzilla and, while not a perfect fix, looks A LOT better than it did.
For now, until the figure is rereleased or I come across an even better one for less than $15, I'll probably just keep this one around.