Its best to get the cat neutered as soon as possible, but you need to know that might not stop the spraying, remember the spraying is territorial not sexual, in many cats neutering stops the behaviour, but not always. The cheapest and most effective thing to get rid of smell is 50% white vinegar / 50% water, use white vinegar as it tends not to stain. But your wasting your time and energy if the cat is not neutered as he will simply remark it.
Even a chance when he is neutered. If he is respraying after neutering, test this on a tiny surface 45% white vinegar, 45% water, 10% fresh lemon juice. Your home for a while will stink of lemons, but at least its not as bad as strong cat territory.
The cat don't like lemon smell so won't remark it for a while. It might be enough to teach not to spray, and yep you can teach them not to, but you need to buy enough time to do so - natural instincts are really hard, and take lots of love and attention to train out of a cat.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.