by Bruce448 » Thu Apr 01, 2010 9:44 am
Head over to here, there's a few tutorials.
[url]http://www.simmerspaintshop.com/[/url]
But like your finding, it's a lot of trial and error, the easiest way I found it was to use a dedicated paint kit to practice with, find out how it's constructed layer wise, I've been uploading stuff now for nigh on 3 years and i'm still learning and asking.
Bruce