I blocked down the most recent coats of black primer and surprizingly found it had a good mil thickness to it. I assumed wrong about the acetone. I then gave her a really good bath and laid down the final 4 coats of grey primer. I will not be sanding this one until the top of the canard is in final primer as well. That way it will all be sanded together for a seamless match. Pretty excited to be moving so fast here.