Thanks for the info.
I'm not too worried about the cost, as the other party will be picking up the tab for it.
The damage is a spiral starting from the outer rim, gradually getting closer to the centre of the wheel on each spoke (if you imagine a rotating wheel rolling across a stationary point you'll get the idea) The damage was caused by the number plate screw on her car, so it has gone through the paint and on some of the spokes it has also gouged into the alloy by an 1/8" or so. it will need filling as well as painting.
I'm not too keen on running on the spare as it is a space saver, and I generally do 100-200 miles per day.
So, I reckon it would need to be a full refurb with colour match, and possibly a hire car for the day.
As the accident was not my fault, I'm also trying to minimise my hassle!
I'll try to find a 'proper' refurb company near me and get some prices/opinions.
Anyone know of somewhere good in South Bedfordshire?
Or should I just tell her to get me a new wheel?