So far, I've been able to kill all of my crazing issues (even a really bad mess I made, stripping lacquer from late-model, soft Revell styrene with REAL paint stripper...which attacked the plastic much like having poured liquid cement on it) by repeatedly and gingerly priming, allowing to flash COMPLETELY so as not to trap solvents, sanding flat, and primer-sand-primer-sand, repeat as necessary.
I'm sure you regulars are sick of seeing this car over and over and over, but the truth is that this is the decklid I thought I'd ruined (using WAY TOO HOT self-etching primer) and stripped with the real stripper, then saved with the above technique. Looks just like this, still, two+ years later, and nothing has ghosted through.