Hmm I guess in cali the heat must wreck them, my 1974 swingers came out just fine, was green and I shot it black, not prefect but it only cost 6 bucks for a can of plastic/vinyl spray paint. My moms dusters headliner came out just fine as well, getting ready to be sprayed black as well, not fragile at all my darts headliner got moved around in the garage for almost a month.... Removed it while it was in storage and threw it in the back of a jeep Cherokee and had not one single problem