Trukks, and Warboss

I've been working on my ork trukks for the past two months.  I used two techniques to get the rust effects on my trukks.  The first effect was done using a liquid frisket latex mask, the other weathering powders. 

Here's the trukk crews.

Here's my converted AoBR Warboss.  I chose to change out the stock weapons for a big choppa.  I added a stikkbomb, face biter squig and gave him a different head.  I used green stuff to make a hand grip for one of the shotas on his back, and to enlarge his triceps.