What aspect of your car were you looking to 'dip'?
Must admit plastidip is something I was considering for my wheels actually. They're not awful but you can tell they weren't loved by the previous owner(s) so after two months of owning my wee blob of 182 I'm taking it upon myself to sort the problem. Plus I want it to look like a beast in the summer!
Friend of mine recently 'dipped' the mirrors and alloys on his Alfa and I must admit it looks very tasteful (I'll find a photo for you sometime) but I'm not sold on the 'matt-look' for the petals on my 182. You can get a glossifier for plastidip though easy enough off their UK site. If you're confused about applying it then just Youtube a few tutorials. Loads of people out there use this stuff.
Check out some of the stuff on their UK site :
http://www.plastidip.co.uk/
Only considering this because a full restore in shiny anthracite will set me back £280 and just upgrading to a set of Turinis is near as makes no difference - double. Where as 5 cans (I'd look like such a tw*t if I ran out after 4) of plastidip gun-metal grey plus a sunny day of my time will set me back £50 and act as a temporary measure till I can reasonably justify throwing another few hundred quid at the car.