I think I've re-discovered a painting technique that gives some depth to resin grill inserts.
I've painted resin grill inserts before; usually with a light aluminum paint (I use Tamiya Mica Silver). It gives a good color, but it has no depth and the grillwork can sometimes get lost in the background of the resin casting.
Right now I'm building out a resin Ferrari 166 M Barchetta and I wanted to see if I could get some depth to the grill. So, I first painted it flat black. Then I mounted it flat on my spray turntable and hit it horizontally and low with the Mica Silver. I gave it 4 light squirts; one on each of the four sides of the grill. Then I went back for a second coat with the silver so that all of the edges were silver.
It came out well. It was quick and easy to do. I can post a pic if you'd like.
Allan