A couple of Comments.
1. At a young age (14), when I got my very first 35mm camera, I was told to put a UV filter on the lens, more as a protection device than anything else, if you dropped your camera. That was the best advice I ever got as a beginning Photogragher.
2. While serving in the US Navy attached to VAP-61 I was detached to Townsville A. Aug.69 and while there, the Aussies applied a couple of their Dayglow Orange Kangaroo's to the side of one of our very light gray RA3B's. When several of us shot some B&W we found that the gray scales of the aircraft body and that of the Kangaroo's were exactly the same. So we got our collection of filters and tried them. One of them got the kangaroo's to realy stand out, which one I do not remember as I have lost my notes from back then.