Some Sharpie mug DIYers may advise you to spray the mug with acrylic sealing spray to make sure the Sharpie etchings doesn't rub off. I personally didn't want to do that because the spray can be toxic ...

You may not need another reason to buy more mugs at the thrift store, but regardless, here's some more motivation to go thrifting! Instead of buying mugs and dealing with whatever decorations they ...