I have a polyester rug with long thick surface fibers. Dog went all over it. I have pit washed the rug and got rid of the odor but can not get the yellow/orange spots out. I have treated with a peroxide cleaner with no visible results. Any suggestions?
Usually peroxide works. However the discoloration could be from the nitrogen in the urine. Female animals contain more nitrogen than males and if the urine sits long enough the staining could be permanent. Did you notice any fading of the discoloration with peroxide? If you use joe's white knight most urine discoloration fades within 3-8 hours. White knight is 20% H2O2. If you use a weaker peroxide you may need to treat it multiple times with over several days to get it to completely disappear. If no fading of the discoloration is observed then chances are you have a permanent stain due to the nitrogen in the urine. This is most common when the urine has set there for a long time. The longer the urine is present the more chance of permanent staining. That being said in my experience Joes white knight has removed 98% of all urine discoloration I have come accross over the last few years.
Maybe the customer used an off the shelf spotter and didn't tell you?
Sorry Joe I am not sure what you are referring to. STW is having trouble removing the urine stain. I was explaining that some time the nitrogen (especially in female pets) can cause permanent staining. That being said I believe the problem with STW's situation is three fold. 1st it sounds like severe urine 2nd severe urine needs strong peroxide and it sounds like he only used a cleaner that contains peroxide. 3rd There was probably not enough dwell time. I says soak it with white knight and let it sit for 8 hours and I bet there will be a noticeable improvement.
Polyester is prone to colourloss. Is it possible the orange your observing, is the result of the oxidation of the blue pigment in the rug? A DIY attempt with an oxygenated laundering product would cause this.