The swab that removes runs fast and easy. Tru-Swipe will test a surface and instantly see if you're painting over water-based or oil-based paint! Tru-Swipe swabs also get rid of paint runs fast and easy without sanding. Watch video below. It only takes a few seconds! Swabs come 3 in a pack. So 2 packs of 3 is 6 swabs.