the parts look good so far !
Weathering seems to challenge our skills more than any other. I normally build 1/ 35 armor, where several techniques are used for wear.
One that I've tried, is the "hairspray" technique. Simply put its a removable layer of clear between layers of paint!! Take the 5th wheel above, apply the red oxide, after it dries, then apply a thin layer of hairspray..cheaper the better..allow to dry then spray the top coat ! Now the fun begins!! Before the top coat fully cures, take a short stiff brush, apply a little tap water, and scuff away the color as desired!! When satisfied, pat the area ;lightly w a tissue and allow to dry overnight!
The water will dissolve the hairspray, leaving the under coat intact! Tools like a sharpened t-pick, sanding sticks, give different effects, try em all!
Here's a tip, enamel is tougher to remove, but leaves a finer sublte chip effect..acrylic is easier to remove.
Id post a couple pics, but photobucket is giving me fits again