oldermodelguy
nothing lost everything to gain.
That's my take on priming, too. And I second the vote for Stylnylrez. It is so easy to apply and dries so insanely fast that I can't find a reason not to prime.
Though I agree with Stik inasmuch as Tamiya acrylics bond quite well to styrene, my position is once you have had one major incident with acrylics pulling up with masking tape that might be enough to persuade you to prime everything.
Put another way, you are probably ok with Tamiya, but is probably good enough? It might well be, or not.