Preserve

What pen to use for autograph on guitar, and how to protect it?
How do you preserve a signature on a guitar?What kind of pen do you use for autographs?How do I keep my signature from fading on my guitar?How do you ...
What key should I transpose Db major to preserve the original feeling?
'To preserve the original feeling' - any key. As, on piano, all notes are part of 12tet, and to most people, a transposed piece will sound the same in...