The other day I noticed a small dent in the door. Looks like it was caused by someone slamming their own door against mine as the dent is vertical line. In the photo it looks like there is a cratch and paint missing but its not, just a reflection. It's quite small but very noticeable so I'm thinking of having it fixed. Can someone give any advice on how easy it would be to fix, what it might cost and who best to see to have it repaired? I live in north west london in case someone has any specific recommendations.