1. In sandpaper we trust. Use rougher paper in beginning,
the finish up with very smooth grade.
2. Woodwax I hear is the best. Atleast german manufacturer
called Osmo Color does it. Easy to spread with cloth and good finish.
3. Couple of days work, most of time goes waiting the paint to dry. Sanding takes perhaps 30-60mins and painting 20-30 mins at a time.
Trust me, I painted lot at school woodworkclasses