Perhaps a smidge off topic but I found that when I first started using suds on a Harrison L5 ( applied with a 1 litre garden centre squirty bottle ), I’d often get staining under the felt wipers on the saddle.
The cure was to remove the little metal covers so the felt was bare – persumably, this allowed the suds to evaporate more quickly and reduce the time it was in contact with the bed
So perhaps likewise for a mill table, don’t leave any cover on where suds can sit for long periods !
W.