What Mike said. A bottom job is what it takes to get your bottoms back to basically factory specs. That may include glass work and filling, and will most always include gel coat work (fairing, and polishing). Most bottom jobs from our fiberglass shop go from between $500 and $1500. One A class I remember was around $2500 due to the Kevlar construction and Awlgrip finish. That's a different beast though.