Firstly, Rub n Buff is a wax, not a paint. Don't seal it, you'll end up dulling it. The first key to Rub n Buff is a smooth primered surface (the smoother the better). Wet sand it until its so smooth you could eat off of it. The second key to rub n buff is the buffing part. You gotta buff it really hard with your bare hand. Apply enough to cover the surface and spread it around then start immediately buffing with your hand until it feels like the skin is going to melt off. Rub n Buff will cure after a few days. However, it will rub off onto things until then. The reason Rub n Buff is preferable over the other methods is that it's silver (not chrome), it's very cheap, it's easy to use, and it produces excellent results when done properly.