I'm novice, so bear with me please. I have only been using this Nikon F2 for a couple of months and have never taken it apart. I looked in the manual and decided to clean the viewfinder and lenses to see if i could clean them up and get them looking better. Part of the fuzzy, black cushioning that is adhered to the camera body (where the viewfinder makes contact) flakes off whenever I take the viewfinder or focusing screen out. I can see black specks when I put it back together and look through it. They are obviously the same little flakes. My question(s): Will material on the focusing screen show up in the photos? Or, is that view only for me to frame up and not what the film is exposed to? What components of the camera / lens are the most importantly to keep debris out the final shots? I've read I need to get some microfiber cloth and maybe a specific type of alcohol to clean the lenses, mirrors etc. Any help and suggestions are more than welcome! I'm afraid to shoot any until this issue is resolved.