Be careful with who you ask to refurb your alloy! Some companies advertise as refurbishers but what they actually do is just sand down the damaged area and then spray it. This is okay and looks great but if the damaged area is quite large or deep then the alloy itself can actually look out of shape because it has been sanded down and therefore lost the lip!
If you have only a minor area then you will be okay but if it is a bad kerbage and deep then ideally you need a piece welding into the alloy and then sanding down. Some companies advertise as 'refurbishers' but really they are 'refinishers' The finish is very good either way but I would be careful when cleaning the alloy in future as chemicals can damage the paint finish, it won`t probably be as good as the original was. I speak from experience, I`ve seen chemicals damage alloys before
HTH