There's an old saying about opinions, like assholes... everyone's got one. Same generally goes for advice, especially unsolicited.
I find myself getting asked for painting advice, which I do my best to give. It works best if I can 'show' someone, because I'm not always good at explaining. Now... I'm a fine artist by training/education, cartoonist by trade. I've been painting with acrylic paints for 30 + years. And even though I was a student teacher in college (for figure drawing), I haven't done anything really instructional in over 20 years.
My fellow blogger and general all around kick ass hobbyist, Ron over at From the Warp did a great tutorial on values, which I would love to share HERE
Inspires me to do something more instructional... maybe. Or I'll just stick with the goofy battle reports. Wait a second.... I have a new Chaos Codex to read. Bye....