Under NO Circumstances accept liability or responsibility!
Even with Public Lib Ins, don't go there! He's trying it on!
As previous post said, let him call cops, they will tell him its not a criminal matter but a 'civil' one and he will have to pursue you in court privately.
That will cost Him!
He wasn't stood at your side when 'alleged incident' occurred so therefore no proof. No witnesses!
Do Not Under any Circumstances show him your 'Public Liability' Insurance Docs, he will just see those as a way of making money from you + your Insurance company, and go for a full respray of his motor, your premium will double if not treble!
Be polite but VERY firm, deny that you caused damage and by all means try to reason with him and show him your 'Plastic' end caps on your poles, in order to try and convince him that there is no way they could of scratched his car, then after all that if he's still persistent you are to blame, just say 'I'll look forward to seeing you in court then' and walk away!
You'll never hear from him again.....apart from the bullpoop he'll try to spread on the estate of course!
Good luck.
P.S. speaking from experience, had a custy accuse me recently of damaging their conservatory roof with my pole, was kids on estate throwing stones, but they knew I was insured for £3 million Public Liability. Cheeky C++ts, they will all try it on with your insurance before their own!
Always be Polite but FIRM! they will back down every time, remember, NO PROOF..... NO CLAIM!