Not much to add to the swish discussion. Just my 5 c worth:
I have sometimes damped some swishes in RX5 by using the Lasso Tool and
Deconstruct, but it is a slow and tedious job.
First in the spectrogram display mode surround the swish with the Lasso.
Then reduce the Noisy Gain with the Deconstruct, but very carefully.
You might want to use as low damping as 1 or 2 dB at a time.
You may need to define the Lasso area by trial and error and go back and
a couple of times, as you need to draw it visually.
Then use the Lasso again and mark the swish area that looks "loudest".
Then use Deconstruct, etc. Sometimes you need to do 5-6 rounds with
for each swish. You need to listen to the spot after each noise
to be careful that you don't cause a drop in the overall noise.
If there is constant, steady and plain noise somewhere close to the
swish, you might
be able to Copy and Insert a piece of it into the place of the swish.
The Lasso tool may
show up usable in this Pasting, too.
I have used this technique only for reasonably short passages. The
problem is that
if you damp swishes from some part of the music and leave the rest of
intact, the remaining swishes will sound more irritating than they did
And as with almost all noise reduction, I tend to leave the noise
preferably a little
on the disturbing side than make it too clean.