Discussing scanners at France is a moot point; as you are not scanned there – unless you left the airport and are then checking in again. I do not believe this to be case here. So really, you have no concern if there are or are not body scanners at CDG as it does not impact the course of your journey.
You will only be scanned once (when you enter the secure zone) at your departure point – which is Spain.
Here is what will happen:
Credit:stackoverflow.com‘
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