How to spread liquid adhesive quickly over a large surface area? Instead of dumping those phony plastic credit cards you received in mail, save them. Save your used phone cards too. Then you can simply use these wasted plastic cards as glue-spreaders! Use the plastic card to swipe and spread the liquid glue into a thin, even layer of glue over a big surface area. What's more? You can just wipe the card clean and reuse them again and again.