Tamiya Calsonic Impul Z WIP

[Macio4ever]

I had once the same effect.
In my opinion blue has not dried enough and clear was sprayed a bit too heavy. Gunze Top Coat has IPA which attacks even TS paints. TS paints and Gunze C are durable but longer contact with IPA makes them crack or melt.

Other option is that blue was sprayed too heavy and reacted with primer. By coincidence the effect has appeared (and magnified) when clear coated.

Bad luck. Anyway, don't give up!

[Balls77]

I had a similar "experiment" once where I had thick coats of paint that was not quite dry, sprayed the clear and same effect.