I notice you're in the UK. If you don't yet have a paintshop, I would recommend a Porsche Approved Bodyshop of the highest grade (I think there are 2 or 3 grades). We take all of our cars to the local Porsche Approved body shop--they're always getting into scrapes of one kind or another, those naughty cars--and the results, though not cheap, are generally excellent. The only problem can be that the new paint is sometimes of a markedly superior finish to the old paint (this happened to a friend's BMW). Obviously not a problem for you, though.

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190