Truckers comment is tactless and could be considered insulting to someone starting out in this hobby, don't take it to heart rather think about thinning your paints with water and applying a little more carefully. Come into the forums where you will find a wealth of advice and helpfull suggestions.
There is a good tutorial on montaging images here: http://www.coolminiornot.com/forums/showthread.php?16232-Photoshop-Montages. The white background is a little distracting.