With just one application, the Dr. ColorChip process for chips less than 2mm in diameter, you should achieve a good fill of the chip. Our customers ask us if they can achieve a better fill by building up the chip with a follow-up application. The answer is Yes. Larger chips very well might need a 2nd application to build up the layer that fills the chip. You can wait a day to allow the first layer of paint a chance to harden, and then come back and do a 2nd application 24 hours later. The expectation we want our customers to have going into the repair is that the chip will be slightly less than a 100% filled, but from 3 feet will look really good! We do tell our customers, the Dr. ColorChip process, while the best available solution to repair stone chip damage, it is not a replacement for dented heavily scraped panels with compromised flaking clearcoat that requires a body shop respray. However, for chip damage and minor scratches, because our system allows the excess paint around the chip to be completely removed, you will realize that a total fill is usually not required to render a visually appealing repair.