If you have a 500 excess then you will have to pay that ammount before the repairs get carried out. If it was just window damage then you could just claim for the glass and it wont affect your insurance at all. But if you do claim on your policy it will count as a fault claim (because your company will have to pay out) and your rate will more than likely go up at renewal, not by a huge margin but up it will go.
Your protected no claims bonus protects your 'Bonus' not your rate. Basically means you wont loose any discount you've earnt up until now through years of driving claim free. Ie:- (if you have 6 yrs protected, it will remain at 6 yrs protected not drop down) But if you claim on your policy, your rate will probably increase.
Best advise I can give - with the excess you have, best to get it done privatley.






