Like tile, most paint will differ slightly in each lot produced. If you plan to use the same color thoughout your house, it's a good idea to purchase as much paint as you can at one time. This will avoid any deviations in the paint color and save you an extra trip to the store.
Never begin sanding on the wood of any carving project until you have completely finished carving it. The small particles of abrasive that lodge in the grain can dull your carving tools fast, and can quickly destroy all the benefits of using good sharpening equipment and techniques.