How can I prevent my BMW 330ci's bumpers being stolen?

How can I stop the bumpers of my standard BMW 330ci from being stolen? I was thinking of putting a note in the window "parts marked". I notice a lot of these bumpers on eBay.

Asked on 12 May 2011 by MA, via email

Answered by Honest John
There is obviously a market for CI front and rear valences. You could try security by hidden microdots containing a code unique to the car. It costs £250 to have applied by www.mighty-dot.com and is expensive, but cheaper than new bumpers.
Tags: theft bodywork
Similar questions
My local garage is repairing some minor scratches on the back of my Honda Jazz and a very slight dent in the back. They will also touch up a few minor scratches on the sides. Their fee is quite high,...
I ordered a spray touch-up paint (and primer) for my wife's Kia Picanto from an online supplier called Autopaint St Helens. The door plate gives the colour as KCS, which is called 'Sparkling Silver'. Having...
I omitted having privacy glass on my new Porsche Cayenne and regret it. Can I have the windows tinted retrospectively?