Well personally while I use Audacity for most of the process of digibitting LPs and 45s I don’t use the Noise Removal. Rather, immediately after capture I export a WAV file and process it through Click Repair (costs c. $40 but produces almost magical results on my recordings) the reimport the cleaned WAV back into Audacity for further processing - silencing inter-track gaps, maybe shortening them and maybe fades.
My workflow is documented in the Manual: http://manual.audacityteam.org/o/man/sample_workflow_for_lp_digitization.html
See also this sticky thread in the Forum on ClickRepair: https://forum.audacityteam.org/t/click-pop-removal-clickrepair-software/1933/1
WC