Rain bow dots and sparkles. Put stickers down first on the mug. Dot all over with a Sharpie, then peel off the stickers before putting the mug in the oven! Cute for Christmas gifts if kids make for a parent.
Buy plates from Dollar Store, write things like, Night Before Christmas, wedding vows for a gift. they used a Porcelain 150 Pen which is permanent and safe once baked for 30 mins in a conventional oven. --I like this idea!
I’ve used two parts acrylic paint to 1 part craft medium. This makes your finished project soft, washable and permanent. Keeps the colors bright, and doesn’t chip or peel as if you were using regular acrylic paint.