Hello there Tim
I use mainly Chemspec Products and yes the acid rinse deoderiser does work after cleaning the carpet,You just mist on after cleaning.
they are not very strong and the dilution rates are 30 ml per 5litres
saying that I have been using solutions M Power and getting exellent results all week, there is one Chemspec product called kill odour plus, it is a deodouriser and traffic lane cleaner in one, I have used this on contaminated carpets and have achieved exellent results! you just spray it down leave it for 10 mins or so then rinse out for cleaning and deodourising in one
Best regards Stu clark