I picked up a couple of UH-1 die-cast models for cheap at Target a few months back that are 1:100 in scale, perfect match for my 15mm Vietnam project. In fact, their purchase inspired the purchase of the 15mm stuff.
I finally gathered the courage to attempt a repaint. I used Army Painter "army green" spray then picked out the details, and applied a few decals from my bits box. I decided not to mask the windows and just paint them over. One of the main goals was to reduce the "shinyness" of the die-cast.
Here it is- the green is a bit light and I would prefer a more olive drab, but I always find that lighter colours work okay in smaller scales. A good find for the price ($5 each).