GRJ is right. You can certainly do it. It won't hurt anything. I did on my first post-haitus layout.
But with brass's non-conductove oxide and DCC's lower tolerance for dirty track, I found that I had to clean the track about every other day. That's a PITA.
Connecticut Valley Railroad -- A Branch of the New York, New Haven, And Hartford
"We don't stop playing because we grow old. We grow old because we stop playing." --George Bernard Shaw