Okay, it's been a lot longer between posts this time than I'd like, but I hope I can make up for it with a bunch of Bridgman studies. Mostly hands, but a few arms too, after I got bored of all the hands. (I'll come back to them later, honest.)
I totally love the metal studies - metal is so hard to render... (for me, anyway!)
As for the last painting, my recomendation would be to get some contrast in there... both with value/tone but also with soft vs. hard... the clouds are very soft and fluffy, but your mountains are looking a bit fluffy too. See if you can harden them up, get them to stand more like stone. Also... I might make them bigger... right now they're pretty tiny compared to the sky - keep in mind that a lot of mountains are tall enough to actually *breach* past the cloud cover!