Hi guys! Well, I did use Blacken-It on the chain. I don't know if it was just the kind of cheap hobby chain I was using or what (maybe the wrong kind of metal), but I didn't have much luck with it...even letting it soak over night. Instead, I ended up just putting a bunch of pastel powder on it. The build went fairly well. The rails and exhaust system on top were probably the hardest part to get done correctly. The tracks are made of this material that's kind of a stiff vinyl or something like that. I put them on the tank with super glue. I just glued an inch or so at a time and held it down tight until it dried. The tracks actually ended up fitting perfectly around the tank...nice and snug with no trimming or gap filling needed. I was really happy with them in the end. Thanks and keep the comments coming.
On another note, you all have probably seen that I've posted pictures in the forum of three of my models over the past couple of days. The Mk IV, DUKW, and 251/1 are mine. This is the first time that much of anybody besides my family has looked at my work. I was quite nervous to submit my first pictures to you all. However, I've found it extremely exciting and rewarding to hear all of your comments and critiques. Thanks so much to everybody for making this a great site where people are so welcoming. And to anybody who's been thinking of submitting pictures of your work and haven't yet... DO IT! It's rewarding and quite helpful.