rlhome.polo.com has just put some great tips with online videos that have really useful pointers. they also bare no bones about how long it takes (quite a while) and how much work (quite a lot) one can expect to get the finishes looking the way you want. i highly recommend anyone to take a look before starting a new RL paint project.
check out the site at http://rlhome.polo.com/rlhome/products/paint/default.asp
i've had some good luck with the river rock finish in canyon clay - but it did use a _lot_ more paint that i thought. (not enough primer, perhaps)