I was performing what should have been the simple replacement of a
squealing tub spout with a new one, but I managed to mess it up good.
The tub spout that I purchased required an underlying adapter that
attached to the 1/2" copper pipe and then the spout fit over it. The
adapter had a metal ring and a screw that went in and against the pipe
before the spout went over it. When I had the whole thing on, I
realized that it was about a quarter inch from the wall, probably due
to some plaster residue on the pipe that did not allow me to slide the
adapter part any further. The adapter has a screw that holds it tight
to the pipe. When I removed the whole apparatus including the
adapter, I had to yank and twist pretty good to get it off due to the
condition of the pipe, which was not bad at all but just was not slick
enough. I eventually just screwed the thing off since the adapter was
now jammed into the tub spout. What happened is that the screw that I
thought was not against the pipe etched a circular line around the
whole lenght of the copper pipe. These etchings catch the adapter and
do not allow me to get the thing within an inch of the wall now.

Is there any way to smooth out the etchings I made on the copper
pipe? Can copper pipe be sanded smooth? What sort of thing can I use
to smooth out the etchings and plaster gunk to enable me to get it all
the way flush to the wall....or did I totally "screw" it up?

Thanks,
Zack