Eh... nothing, really. Pindot, I guess, just because it grosses me out, but I haven't come across a pony with it yet. I have 3 g1s in my collection currently. Of the 3, one of them is relatively flaw-free; one is a very off white, has a cut forelock, and is leaking her plasticizer; the third has a couple of age spots and is starting to get leaky. But I love all of them so much! At the end of the day, they're almost thirty year old pieces of vinyl and plastic, so I'm kinda accepting of the fact that they're gonna have flaws. They look lovely on my pony shelf, and I'm more than happy to have them if other collectors won't!