Apply a piece of masking tape over the damaged surface. Then remove the tape to remove any loose paint.
If the damage is down to the metal, use of a primer is appropriate. In the event of damage to a plastic surface, an adhesive primer should be used to give better results - spray into the lid of the spray can and brush on thinly.
Before painting, if necessary, e.g if sharp edges are found around the damage, a light sanding with a very fine sand paper can be done locally. The surface is cleaned thoroughly and left to dry.
Stir the primer well and apply using a fine brush, a matchstick or similar. Finish off with a basecoat and clearcoat once the primer has dried.
For scratches, proceed as described above, but mask around the damaged area to protect the undamaged paintwork.
Touch-up pens and spray paints are available from Volvo dealers.
If the stone chip has not penetrated down to the meal and an undamaged layer of paint remains in place, fill in with base coat and clear coat as soon as the surface has been cleaned.