Omar....deglazing means cleaning up the cylinder wall, and preparing it
for a new ring, by leaving a scratched surface to rub against the new ring.
This rubbing will allow the ring to "break-in" in a short time, and will make
it up to full compression as well.

You can use 180 grit dry sand paper as I have done here. Use your thumb
with the paper, and make an "X" pattern on the cylinder as you work around.
When you get it all done, wash it out with some spray brake, or parts cleaner,
and put some fresh oil on the cylinder wall.

Put some fresh oil on the piston and the ring when you put it back together. [sm=thumbup.gif]

FBD.