hey hows it going. honestly black is probably the cheapest color to go with. The problem is that it reveals alot of body flaws. If you paint it black go with a single stage by omni. a gallon of sealer is not really needed. A quart of sealer should do it if deep scratches are remove during wet sand of the primer. You would only need the sealer for spots wher you sanded hrogh the primer a couple of quick coats over body should do, depending on how good it is wet sanded. Guide coat over the primer would help alot to show low spots and deep scratches