Can I retro fit my car with parking sensors?

I have a 2012 Skoda Fabia SE Plus. Can you please tell me if it can be retro-fitted with parking sensors?

Are there any cars with keyless entry, where the keyless entry facility can be disabled?

Are there any cars with keyless entry, where the keyless entry facility can be disabled? So I can use a remote fob and press a button to unlock instead. Faraday cages for keys aren't sufficient for me.

What's the best product to clean a convertible hood?

I have a Porsche 911 Cabriolet with a blue roof that I want to clean. What is the best product to use?

Can I get a dog guard for a new Nissan Leaf?

I have a 2018 Nissan Leaf Tekna and cannot find a dog guard for it anywhere - neither can my main dealer garage. He told me to look online, but I have no joy. I want a well-fitting dog guard to safely...