I weathered the 208 with a mix of Bragdon weathering powders and PanPastels. I find the latter adhere well, and the grays tend not to mute as much as the powders do when a flat fixative is applied. I prefer Dullcote.
After setting up a 28-step speed table using JMRI/Decoder Pro and adjusting the CV66 (forward trim) and CV95 (reverse trim), this unit runs nice and quiet, and smoothly.
Uh, well, to be honest ...
The 208 didn't start out well. Sure, it ran fine out of the box. But I ended up having to replace the motor, a rarity with an Atlas locomotive. In fact, this is the only Atlas motor I've ever to replace in dozens of Atlas locomotives I've owned the past 45 years.
When I put the 208 on the layout after setting the speed tables, it would slow down in two specific places, both on curves, on the layout. I could hear no binding or clicking, so I attributed the issue to a suddenly bad decoder, perhaps not reacting to the addition load of the mechanism in a curve and adjusting the motor RPMs via BEMF. So I popped in a new decoder -- same trouble, though.
Well, after breaking down and inspecting the mechanism for a mechanical flaw (there was none), basic troubleshooting left me with one culprit, a bad motor, and probably a bad winding. Out came the bad motor, in went a known good spare, and all was well.