I use Com-art on paper, board and canvas. You can get it from me or here http://executool.co.za/index.php. I only order as I get orders in. You can also google Caps 'n Cans for Molotow. Very good paints. At the art shops they have Daler Rowney FW inks and Liquitex but it is ridiculously expensive. Also look at Dala acrylic inks. Pretty good for the price but their white is useless.
I have imported Createx which is a fabric paint but have not used it in fabric yet.
For auto work I would suggest you get some urethanes from you local panelbeaters. I don't know how the previously mentioned brands work on metal.