C.M.
I painted my countertops with a product that is MEANT to be used to paint countertops. http://www.gianigranite.com/
I followed the directions exactly and they turned out great! I did it quite a few years ago and it's held up wonderfully.
No, I don't have paint chips anywhere!! Sheesh. You have to put the base coat on, and then use the sponge to put in the "granite" look. The final part is the top coat that seals it in. The seal has maintained itself wonderfully, even through food and a water sitting on the counter. I treat them like regular countertops, and have had no issues.
No one has mistaken my countertops for real granite, of course, but they look much better than the scratched look I had before! I would say they look like granite-inspired formica. Nothing worse than you'd find in a store. I think you'd have to be a pretty good artist to get the totally real granite look that you see on the website. Still, my countertops look MUCH BETTER than they did, and for a fraction of the cost. If you are a great artist, then I say go for it!
Friends have come and admired my countertops and can't believe it only cost me $50.
I highly recommend the products I used. They are MADE for countertops--I wouldn't just go out and buy any old product.
Good luck!