Unless I'm mistaken you can't plastidip a whole car. Plastidip is just plastic in a can, I know of people that have used it on wheels to have a change of colour. Not exactly a refurb but gives you an idea of what the wheel would look like in a different colour and protects the wheel to a degree too.
The cost of having a car wrapped depends on the size of the car but I'd expect £1200 or so for the Mazda. Hold out for the right colour in the first place in my opinion.
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