Your blind spot: self-appointed decision maker

I don't know what the role of "primer" means in your industry, but your boss is the decision maker, and you want to stay away from it. There is a commend chain in every corporation. Your boss can not "pretend", but he is trying to deceive you.

I totally agree with what floatingwind suggests. My further suggestion: You are NOT the decision maker, you got to remove this illusion completely. You are neither in favor nor against HIS decision.

Write an email (and print a copy for future reference, keep it in a safe place) to your boss:

provide your professional judgement based on your expertise; tell him the possible consequences that might be caused by the KNOWN defects ( you've told him before, correct? ). Keep your points strictly in your professional domain, make it objective.

Push the ball back to his court. That's the way to cover your butt.