I have been playing this JM almost daily (and exclusively). But I was still bummed out because of the less than great application of clearcoat, particularly on the back. So I pulled it apart and sanded the body with 400 grit, put on a coat of primer and sanded that with 800 and 1000 grit. I also softened a few curves and removed any trace of the round-over router bit witness lines (which I thought looked nice at first). Also filled a few dings.
Then I dropped the body of at an automotive repair / body shop. My friend works there. He used my left-over rattle can paint to scan the colour (I asked for maximum metallic). They mixed up a batch of modern automotive paint (the water based version) and covered it with a clear coat. A bit of a shame that their system can't deal with the original colour codes from the fifties and sixties that Ford and GM used).
One day later I could pick it up. It had a bit of orange peel but my friend told me to not sand or polish it, just give it a few days. And he was right, it disappeared. The paint feels smooth. It's a really thin coat, based on the masking tape I removed. Nothing like the polyester or polyurethane finishes. So I better not throw it around.