To silk something means to make it smooth and shiny like silk fabric.
Silked things are usually very nice and pretty.
Examples:
She silked the fabric to make it shiny.
The magician silked the scarf to make it look magical.
The princess silked her hair for the ball.
He silked his shoes to make them look fancy.
The car was silked to make it look like new.
The artist silked the painting to make it look special.