I was told using bicarbonate of soda to clean the area takes away any scent and discourages them from doing it again!

Had mine done at 5 months, 5.5months, 6months and the other at 7 months.

use"simple solution" to get rid of smell, also cats dont pee where they eat so try putting a handful of cat biscuits there to distract him

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You never own a cat unless the cat owns you!

I had my BSH boy done at 6 months

Thanks guys, well your advice on the weeing problem has helped.. he hasnt done it since *touch wood*

Yes, it's a very good deodoriser.
However, when we first had our rescue cat, he had an accident (his wee was very strong because he'd only just been neutered), and I found 'Neutradol' air fresheners to be really effective. It comes in a little pot that you just peel the lid off and it eliminates the smell practically straight away