Hi all, thanks for the thoughts! (And the call, Paul [

]) I'm off to a local classic restorer this afternoon for a quote.
Whilst I understand the attitude of claiming the maximum possible, I'm not that sort of character; I can confirm that I don't have whiplash either. This was only a walking-pace, at most, knock, and it's purely because it was the corner that hit my wing that made the damage more concentrated. The damage to the wheel is so slight it's nowhere near as bad as even a light bump on a kerb, let alone the potholes I drive over all the time, so claiming for damage to the steering and suspension would be taking the proverbial a bit IMO. A basic alignment makes sense, it would be frustrating to find it was slighlty out later on, but even that's really pushing the limit of my conscience!
I know it's possible to repair it, but that's not ideal as I'll only need to have more work done at another time to address the usual crusty bottom. It seems fair that the wing is replaced, so that's what I'll push for. This gives me the chance to get the inside looked at as well, addressing any corrosion on the a-pillar for instance, and I can get some other bits sprayed at the same time. Of course, I'd want these treated seperately and pay for them myself; the good news is that it will cost a bit less as part of the repair. That way I get something back for the time and trouble.
I think it's only fair to offer him the chance to pay it direct if he wants, saving his excess and no claims. I know you have to notify the insurer of accidents even if you don't claim; I did this once over a tiny knock that only needed a new light and touch-up to the bumper on an old car, and they thought I was mad to tell them. Certainly claiming does have ramifications, even if it's totally non-fault. I still have to declare a non-fault claim I had on the van, and although the existing insurer have never hiked the price it makes calling around for alternative quotes a pain.