Depends in part on how much of the rim is out of sorts. A tacoed wheel, one with a rim
that looks like the edge of a potato chip is hard to fix with spoke tightening without
fixing the rim first. If the bend is over 4-5 spokes you may be able to adjust it out
by spoke tensioning, but likely the wheel will not be 'like new'.
this video and others obtaining by google might help:
https://www.google.com/search?ei=Jge...P5bM#kpvalbx=1
Back in the day of really light rims a tacoed or pringled rim was easy to pop back flat
and something I did several times. Youtube has several videos on ways to fix these,
then use fine tuning with spoke tensions. Radial irregularities are a little harder to
fix than axial ones.
Youtube:
https://www.youtube.com/results?sear...+tacoed+wheels