I responded off list to Steve Smolian with this suggestion which as worked for me.
If the swish can be seen clearly enough on the graphic display, it can be selected and
the Interpolate tab in the Declick tool will often remove it very well, especially if it
contains a lot of high frequency content. Manually selecting each occurrence of
swish, which tends to recur once per disc revolution, is extremely tedious work, but
the results can be excellent. Interpolate works on audio of 4000 samples or less,
so if the swish lasts longer than that, it can be divided into smaller sections first.
And it helps to remember how interpolation works: it looks for audio without
swish immediately ahead of or following the section with swish, and once a
section is cleaned up, it can allow sections adjacent to it to be improved by
repeated use of interpolate.
Audio Restoration and Mastering Services
193 Baltic St
Brooklyn, NY 11201-6173
[log in to unmask]
People Over Profits