I wonder how good 845`s UV resistance is...I`ve been OCWing my lenses as a final step to provide a (presumably very minimal) added boost of UV protection in addition to whatever LSP/etc. I have on the lenses.
I *NEVER* use LSPs on glass, though I know some others like it. In part I don`t think it`d last very long as I clean exterior glass quite frequently but mainly because I can`t *imagine* it being optically decent by my standards.