Buying a new car - how much should I pay for paintwork protection?

I am about to purchase a new Toyota Prius and the dealer is offering a treatment of Gen 3 glasscoat protection at an additional cost. Is there an advantage to having it done or are there better treatments elsewhere?

Asked on 22 November 2016 by ian walker

Answered by Honest John
I don't know this treatment, but all paint now needs something because regulations mean it is water based, covered only by a thin coat of solvent based clearcoat lacquer. Worth £200; not more than £250. Costs the dealer less than £100, so anything else is commission.
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