Should I buy G3 Glasscoat for my new car?

I am looking at buying a Toyota Yaris 6 months old from my local Toyota dealer - they are advising me to take the paint protection - does this really work?

Asked on 17 August 2012 by the scrivster

Answered by Honest John
If it's under £200, okay, otherwise spend £45 on a tub of Autoglym hi-def wax and DIY.
Dear Honest John,

Please help me choose my next car. I would like it to have:
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