In the decoupage process, after applying the gold/silver leaf, leave it for 24 hours before sealing. Many books recommend that you shellac after gilding. If you don’t have shellac on hand, you may choose to opt for your sealer. Decoupage is an art which is mainly done using scissors, but experts use other different stuff to enhance their work. Like using paper punches, quilling strips or stickers. But note that you do not use all these ideas in any competition because usually there are certain rules in any competition which would not allow you too use other forms of art in your decoupage project. But definitely when it comes to gifts and sales items, anything is permissible that you want to use.
Stickers can also be used to decoupage your object. But since they are thick, you will need to apply loads of varnish on them to make your work smooth. They can ideally be used on coasters and tablemats.Even quilling strips can be used in this craft. Quilling strips are available in many colors, even in metallic gold and silver colors. These are easily available with the traders who are into supplying card making materials. Its fun to use them especially the metallic ones...