I found this awesome golden fabric paint (after looking for forever).
I painted random pieces of white cotton, using a fairly thick paintbrush. Easy peasy, you just paint the fabric whichever way you prefer, let dry for 6+ hours and finally iron hothothot through a piece of cotton.
I originally printed polka dots on the fabric, but it turned out this fabric paint works better with a paintbrush.
I’m going to paint more of that cotton and make white curtains with gold for my room.
Works perfect also for a pillowcase.