It all takes time, like watching paint dry! Jobs always take time on a boat because what you need is at the wrong end!
Yes, and you need to paint both sides if everything and you need to leave it somewhere it won't get touched (or in the way) for at least 24 hours. Most wood needs Primer, Undercoats 1 & 2 and Gloss coats 1 & 2, then both sides - that's 10 paint jobs per shelf! I have brought a couple of them home to get on a bit quicker!Colin