Ok so im a beginner to forks i dont know much maintaining them so here it goes. I always see black stuff on the fork and it seems like its coming from the inside of the fork(like the bottom part) Is anything damaged? If not what is this and how can i stop it. It's not a liquid but more of a grime. Any help would be awsome. If it makes a diffrence they are Marzocchi EXR Comps '03 version. I tried taking pics but the flash mirrors off the fork and when i turn on the flash you cant see it. I'll get pics of the fork if you need it also.