You can smarten up unglazed figurines by coating them with clear nail varnish.

If you have a glazed figurine, plate or ornament that has been chipped you can also cover the chip with clear nail polish/varnish. However if the item has a distinctive color then the chip will still be visible. So before you cover it with clear nail polish touch up the mark with a marker pen of the nearest color match possible. Allow the marker to dry and then cover with clear nail polish.

When it comes to cleaning figurines of any type a very simple method is to. Mix dishwashing soap in water and then vigorously dunk the figurines in water and they will come clean.