After quite a while, here's a small update.
The radiator has been mounted. I first sprayed Motip Chrome on, like I said above, and it gives quite a nice effect when you have enough light on it, but all things can be done a little bit better. So I started experimenting with the C1 Models product. It is a powder (I think graphite powder?) which is to be applied over a black enamel undercoat. It immediately gives a shiny finish but when buffed with a soft cloth the effect is really nice. You end up with some kind of "black chrome", you can notice that is is still black, but with a highly gloss finish.
The big advantage against for instance Alclad is that you can buff away fingerprints: just polish lightly with a soft cloth, or maybe add a little bit of powder and buff again. No problem at all.
I did the front bumper and the headlights with this powder.
Which at the same time caused me a problem since the radiator was a completely different finish, and there was no way of dismounting it again.
So I chose to add some patina to the radiator: some oil paints diluted with a little bit of white spirit did the trick. The radiator is still to restaur, let's say
By the way: I needed to take the airfilter out again and shorten it by about 1 cm. I don't know what or where I did domething wrong, but it must have been something. Either it was not mounted correctly to the engine cradle (which I belief was done as it should have been), either the wing is not mounted straight and in the correct spot. I can't figure it out, but anyway, it is in the car again.
Here's the piccies :
