The foam dam/urethane gives a nice result. The original thiokol had a foam or cloth composite dam to give a nice border around the glass. The foam (which is like self adhesive weather strip) gives a professional looking border too. You just need to lay it down straight. Doing it yourself will allow you to take the time to center everything up and adjust the stainless up or down for best fit. I did all the prep work on mine and had the glass guy lay down the urethane.

The most important part to paint semi-gloss black is your A-pillars. The header would be second. The dash will be what ever color is called for in your interior.