Came accross this firm the other day... Basically, they apply these coatings to metal or plastic parts...

Parts shown are an alloy engine case and a plastic radiator grille.

Wicked Coatings hydrographics carbon dipping, camo dipping & more

Just thought it's pretty cool

Edit: Cost for both of the above items was approx £100 ... roughly £30 for the engine case & £70 for the grille ... so not unreasonable

 

Looks very good - we have a local guy who does it - not sure how it will last on engine casings or any parts that get hot as it's a form of plastic film.......