I'm so glad of yours kind words. About the burnt effect, i did this way:
At first layer of paint right after primer and black shading, I used Chrome Silver and Chrome Titan. Then I masked it and sprayed the cammo color.
After somes gloss coats, I washed with oil paint Raw Umber and Dry brush with lead and also Tamiya's Weathering set D.
I tried making change with dark fond :