Great build and paint.
My nitpick with the decals is that they are not historically accurate. The lightning bolts should face forward, and there was no Thunderbolt IV. It was Thunderbolt VI.....Abrams' tanks were Thunderbolt V, VI, and VII. So a quick swap of the two letters would have helped. Otherwise, fine looking.
Rob
P.S. On a second look, I agree with the silvering of the decal edges. It happens. Also, you used the wrong suspension on the kit, as it should have the "upswept" return roller arms on each bogie. The kit comes with both. Also, the right tail lights should both be black, not red over black.
Having said that, I love your snow effects, you did a great job on the indy tracks, and the streaking on the hull and turret is all well done. Basically, I'd say it's painted and finished well, but could have used a bit more on the research end.