Chris Walas.... on weathering a bulldozer..... OK, a little info on the weathering. I wirewheeled the paint off the rear claws, but had to use paint remover for the blade. I scratched up the blade first so that the paint remover would leave an irregular edge. I used "NATO Tricolor Brown" (it's a little richer brown than roof brown) for the overall rust/wear look. The treads have washes of Raw Umber/Black and a thin Rust as well. The flecked dirt and chipped paint effect was added with filter foam (the same one I showed the Sculpting Class.) in brown and thinned black. Most of the bare metal edging was done with Gun Metal, again sponged on with filter foam. There was a bit of detail finessing, mostly shadowing with a brush and thinned black. I have to admit, there was a fair amount of work on this and I'd never weathered any constuction equipment before, so I was a little hesitant. Now I almost wish I was modeling modern day so I could do some of this for myself! Here's a shot of filter foam. It's also known as Scot foam, Scotch foam, 3M foam, and open cell foam. It comes in several grades, depending on the size of the cells. It's quite strong, but it's not cheap. The most open cell version is also the most versatile for painting and sculpting. It can sometimes be found at hardware stores, but most airconditioning shops carry it. It should last a long time. One tip is to wash the foam with regular dish washing detergent. This will soften the foam initially, but it will stiffen up again when it's fully dry. The "hand softener" in the detergent actually acts as a preservative for the foam! I'm still using foam that is at least ten years old! I have to admit, there was a fair amount of work on this and I'd never weathered any constuction equipment before, so I was a little hesitant. Now I almost wish I was modeling modern day so I could do some of this for myself! Here's First Gear's webpage the bulldozer is a little big. Treads side to side are about 4 3/8" and about 7" long. It's about 13" overall. It's 1/24 scale, but would easily pass for 1:20.3 if you took the cab off and put in a larger seat.