Repairing stone chips
Place a strip of masking tape over the damaged surface. Pull the tape off so that any loose flakes of paint adhere to it.
Thoroughly mix the primer and apply it with a small brush.
When the primer surface is dry, the paint can be applied using a brush. Mix the paint thoroughly; apply several thin paint coats and let dry after each application.
If there is a longer scratch, you may want to protect surrounding paint by masking it off
After a few days, polish the touched-up areas. Use a soft rag and a small amount of polish.