It must of been custom. Bonnie94sse looked at it last Thursday and it appeared that a clearcoat was on top of the striping.
It is definitely custom. And I wonder why that design is on the front door. Usually ppl have any design type thing on pinstriping it goes towards the back of the car. It doesn't look bad though, and it'* not too large.
But the striping WAS clearcoated over for sure. I'm wondering if maybe the car was repainted, then the striping was put on, then the clearcoat was last. Or maybe someone decided to put the striping on a few years ago, and just added another layer or two of clearcoat to help keep it permanent or less likely to be peeled off. Not a bad idea if you want it on there forever.