Print your fav designs on a laser printer .
Cut them the shape of your shoe
stick that with mod podge on the shoe
Let it dry
then top up with mod podge
Coat with weather resistant finish
put a shiny or matte coat as final coat .
Avoid exposure in water .
Give a chic colorful look to your old shoes using various patterns and designs .Follow me here for more cool ideas http://mikichill.blogspot.com/