Can't really see the extent of damage in the photo, but if it's a scrape on the paint, then t-cut or a similar abrasive usually does a good job of getting rid of superficial paint or bumper marks from another car so you can see exactly what damage has been done to the underlying body/paint.
Chipex makes little paint-match kits which work very well on small scratches and chips and with practice and care can disguise small areas of damage.
Otherwise a 'Smart' repair (Chips Away etc.) is very good but it's prob going to cost you £100 or so.