I don’t use sealer on anything. Just a another step which can cause an issue. When you primer and block stuff 15x. It’s all the same color come paint time. Yes. All that stuff is going away. Car will have an all new setupAwesome work ... once again !!
Do you use a sealer before primer on the plastics ?
I'm guessing you're going to change that cai set-up, the current one looks like it's begging to suck up water and hydro lock an engine.