My 1959 3800 had all the above problems, and I found that new brake drums are simply unavailable. Unless yours are heavily scored or way out of round, doing any more turning than a very shallow cleanup cut on them is probably not a good idea. Used drums will probably be oversize already, so if you find some smooth-looking ones, measure them carefully before handing over any money- - - -they're probably machined way oversize.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!