A quick FIY: prepping an old door for it's new coat of paint is time consuming. Please always take lead paint into consideration and take appropriate precautions. I'm talking face mask and gloves here.
This project took two days with prep, undercoat, paint, dry and paint, paint, pain time. Very worth it and reasonably cheap.
I used a high gloss outdoor quality (water clean up) paint and metallic gold spray paint.