I've used Protec paint a few times and have found that the clear doesn't stick to the colour very well (sprayed over fresh metallic). The colour didn't stick to the undercoat very well.
It's a pain in the arse how easily their acrylic chips, but it's easier to fix as all layers don't come off in one shot.
The last lot of spraying I did seemed to have the clear stick to the colour ok.
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