Help! Cat urine possibly on walls

I am trying to pinpoint all the places where my former tenants let cats wee on the floors or spray the walls. We have ripped out carpet, padding and baseboards. Did the black light test the other night with horrifying results. There were so many little spots and big patches along with pretty much every area where the baseboards were glowing yellow-white! Now I'm going back through to do close up sniff tests of suspicious areas to see if I can tell what is possibly old cat urine and what is maybe adhesive for the baseboards or something else that is glowing.....before treating the entire place.

A big concern is that they painted almost every wall, so I can't really tell if the cats sprayed somewhere behind the paint or not. (almost all areas of where the baseboards were have glowing stuff on them, but I can't believe the entire house would be sprayed!)

My question is has anyone tried lightly sanding off the top layer of paint if you or someone before you painted over the cat spray? I'm thinking this would make it show up better under black light for identification as well as make the offending uric acid and salts easier to treat and get rid of.

Thoughts?

Btw, I think I may have found a true solution for the problem with the "123 Odor Free" product line from Just Rite cleaning products. Highly active bacteria cultures that "eat" the urine and actually eliminate it. No need to use shellac or Kilz or anything like that afterwards, which evidently develops tiny cracks big enough to let odor molecules through anyway. Has anyone tried it yet? I would love to know your experience with the 123 Odor Free!

Thanks!

 

I am trying to pinpoint all the places where my former tenants let cats wee on the floors or spray the walls. We have ripped out carpet, padding and baseboards. Did the black light test the other night with horrifying results. There were so many little spots and big patches along with pretty much every area where the baseboards were glowing yellow-white! Now I'm going back through to do close up sniff tests of suspicious areas to see if I can tell what is possibly old cat urine and what is maybe adhesive for the baseboards or something else that is glowing.....before treating the entire place.

Another big concern is that they painted almost every wall, so I can't really tell if the cats sprayed somewhere behind the paint or not. (almost all areas of where the baseboards were have glowing stuff on them, but I can't believe the entire house would be sprayed!)

I have concrete floors downstairs where the carpet used to be and thin wood floors upstairs where carpet used to be.

I think I may have found a true solution for the problem with the "123 Odor Free" product line from Just Rite cleaning products. Highly active bacteria cultures that "eat" the urine and actually eliminate it. No need to use shellac or Kilz or anything like that afterwards, which evidently develops tiny cracks big enough to let odor molecules through anyway. Has anyone tried it yet? I would love to know your experience with the 123 Odor Free!

Thanks!

 

Welcome to the forums!

I'll address it from a painter's perspective - I'd coat any/all areas that are suspect with a pigmented shellac like Zinnser's BIN. That will seal in the odor and take care of the issue for good. Obviously you'd have to paint over the primer.

 

I moved your other thread to this one as it seemed to duplicate your efforts.

 

Nature's Miracle is the brand of product we use with cat urine. Sorry, no experience with the one you've found.

I'm with Mark on using a sealing primer and then repainting.