In this I made one modeled after Princess Peach's crown, but you could easily do this for many other kinds of crowns.
After finishing this I realized it still needs one more coat of paint (since you can still see some cardboard : D : )
~use metallic paint for both the gold and the jewels, and Modge Podge over the jewel parts to make them extra shiny
~attach crown to headband, hair-clips, or wires(if attached to wig)
~use a wet sponge over the model magic before it's dry to smooth out and cracks, and if it's still crack/lumpy after dried you can lightly sand it
on tumblr-> [link]