Yesterday i took my silencer off, and on mine the end caps dont come off, the entire shell does, just leaving the core and cap connected to the pipe that goes to the pipe. So im not sure how im going to be repacking it. But the fiberglass is black. I pulled a chunk of it out, and the top of it fell off, but under it is fine. So i think im not gonna mess with it unless i get it running. But i took some #3 steel wool i found, and started cleaning up some rust spots on the frame, and it made it look better on some of the mounts. So i went over to the silencer, and cleaned up the end cap on the shell, which is the exit end. It went from rusty and crappy looking, to pretty nice looking and shiny. So i did the same to the pipe that goes to the pipe, and it went from rusty and crappy, to nice and kinda shiny. But its pitted real bad, so it still looks crappy, but it looks better then it did at first. I dont really see why you wouldnt be able to use the wool that you cleaned the silencer with to repack it. So if you go to repack your silencer, and its kinda rusty get the rust off with the steel wool, then put it in the silencer. Get full use out of it. But ill have pics up later of what the pipe looks like now. Tomorrow i might get more pics of my silencer all cleaned up.