The house we've moved into and are renovating used to have a self-contained flat on the 1st floor which was lived in by an old cat-loving lady who obviously had *no* sense of smell whatsoever, and we are guessing that she welcomed all and sundry local felines in regularly, since all the numerous local cats regularly try to get in.
Basically these cats have p****d all over the lower walls and skirting board of the flat, and it initially smelt so bad that I could hardly breathe up there.
The walls have a waist-height dado rail and anaglypta below. We've stripped the anaglypta back to the plaster, and scrubbed the plaster underneath with sugar-soap, but one patch in particular still reeks quite badly. I'm assuming the cat pee/spray has somehow soaked in.
Can anyone suggest a method to try and de-odorise the walls? Is there anything better than sugar-soap to use?
Thanks :)