Hi Basil,
The only way it could be holograms is if the car had been machine polished, you can't inflict holograms by hand same goes for buffer trails.
It sounds like you have a good wash method going there, could the holograms have been there when you bought the car?........the only way to remove them, or I should say the easiest way to remove them, is to have the car machine polished by someone who knows what they're doing, you could try Megs Scratch X but hey that will take ages and you'll have arms like iron bars.
I could put you onto someone in your area but remember it won't be cheap but the finish will be "as new" again
Bryan
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